Melin Tool Countersinks | McMaster-Carr

	Dia.		Titanium Nitride (TiN) Coated
3 Flutes





82° Countersink Angle
1/4"	1/4"	2"	Round	Melin Tool	3210A412	000000
3/8"	1/4"	2"	Round	Melin Tool	3210A422	00000
1/2"	3/8"	2"	Round	Melin Tool	3210A432	00000
5/8"	3/8"	2 1/4"	Round	Melin Tool	3210A442	00000
3/4"	1/2"	2 3/4"	Round	Melin Tool	3210A452	00000
1"	1/2"	2 3/4"	Round	Melin Tool	3210A462	00000



90° Countersink Angle
1/4"	1/4"	2"	Round	Melin Tool	3210A413	00000
3/8"	1/4"	2"	Round	Melin Tool	3210A423	00000
1/2"	3/8"	2"	Round	Melin Tool	3210A433	00000
5/8"	3/8"	2 1/4"	Round	Melin Tool	3210A443	00000
3/4"	1/2"	2 3/4"	Round	Melin Tool	3210A453	00000
1"	1/2"	2 3/4"	Round	Melin Tool	3210A463	00000

	Dia.		Uncoated	Titanium Nitride (TiN) Coated
1 Flute





82° Countersink Angle
1/8"	1/8"	1 1/2"	Round	—	———	0	Melin Tool	3213A312	000000
3/16"	3/16"	1 1/2"	Round	Melin Tool	3285A322	000000	Melin Tool	3213A322	00000
1/4"	1/4"	2"	Round	Melin Tool	3285A332	00000	Melin Tool	3213A332	00000
3/8"	1/4"	2"	Round	Melin Tool	3285A342	00000	Melin Tool	3213A342	00000
1/2"	3/8"	2"	Round	Melin Tool	3285A352	00000	Melin Tool	3213A352	00000
5/8"	3/8"	2 1/4"	Round	Melin Tool	3285A362	00000	Melin Tool	3213A362	00000
3/4"	1/2"	2 3/4"	Round	Melin Tool	3285A372	00000	Melin Tool	3213A372	00000
1"	1/2"	2 3/4"	Round	Melin Tool	3285A382	00000	Melin Tool	3213A382	00000
1 1/4"	1/2"	3"	Round	Melin Tool	3285A392	00000	Melin Tool	3213A392	000000
1 1/2"	3/4"	3 1/2"	Round	Melin Tool	3285A412	000000	Melin Tool	3213A412	000000
1 3/4"	3/4"	4 1/4"	Round	—	———	0	Melin Tool	3213A422	000000



90° Countersink Angle
1/8"	1/8"	1 1/2"	Round	Melin Tool	3285A313	00000	Melin Tool	3213A313	00000
3/16"	3/16"	1 1/2"	Round	Melin Tool	3285A323	00000	Melin Tool	3213A323	00000
1/4"	1/4"	2"	Round	Melin Tool	3285A333	00000	Melin Tool	3213A333	00000
3/8"	1/4"	2"	Round	Melin Tool	3285A343	00000	Melin Tool	3213A343	00000
1/2"	3/8"	2"	Round	Melin Tool	3285A353	00000	Melin Tool	3213A353	00000
5/8"	3/8"	2 1/4"	Round	Melin Tool	3285A363	00000	Melin Tool	3213A363	00000
3/4"	1/2"	2 3/4"	Round	Melin Tool	3285A373	00000	Melin Tool	3213A373	00000
1"	1/2"	2 3/4"	Round	Melin Tool	3285A383	00000	Melin Tool	3213A383	00000
1 1/4"	1/2"	3"	Round	Melin Tool	3285A393	00000	Melin Tool	3213A393	000000
1 1/2"	3/4"	3 1/2"	Round	Melin Tool	3285A413	000000	Melin Tool	3213A413	000000

3 Flutes





82° Countersink Angle
1/4"	1/4"	2"	Round	Melin Tool	3285A442	00000	Melin Tool	3213A512	00000
3/8"	1/4"	2"	Round	Melin Tool	3285A452	00000	Melin Tool	3213A522	00000
1/2"	3/8"	2"	Round	Melin Tool	3285A462	00000	Melin Tool	3213A532	00000
5/8"	3/8"	2 1/4"	Round	Melin Tool	3285A472	00000	Melin Tool	3213A542	00000
3/4"	1/2"	2 3/4"	Round	Melin Tool	3285A482	00000	Melin Tool	3213A552	00000
1"	1/2"	2 3/4"	Round	Melin Tool	3285A492	00000	Melin Tool	3213A562	00000



90° Countersink Angle
1/4"	1/4"	2"	Round	Melin Tool	3285A443	00000	Melin Tool	3213A513	00000
3/8"	1/4"	2"	Round	Melin Tool	3285A453	00000	Melin Tool	3213A523	00000
1/2"	3/8"	2"	Round	Melin Tool	3285A463	00000	Melin Tool	3213A533	00000
5/8"	3/8"	2 1/4"	Round	Melin Tool	3285A473	00000	Melin Tool	3213A543	00000
3/4"	1/2"	2 3/4"	Round	Melin Tool	3285A483	00000	Melin Tool	3213A553	00000
1"	1/2"	2 3/4"	Round	Melin Tool	3285A493	00000	Melin Tool	3213A563	00000

6 Flutes





82° Countersink Angle
1/8"	1/8"	1 1/2"	Round	—	———	0	Melin Tool	3213A112	00000
3/16"	3/16"	1 1/2"	Round	—	———	0	Melin Tool	3213A122	00000
1/4"	1/4"	2"	Round	—	———	0	Melin Tool	3213A132	00000
5/16"	1/4"	2"	Round	—	———	0	Melin Tool	3213A142	00000
3/8"	1/4"	2"	Round	—	———	0	Melin Tool	3213A152	00000
1/2"	3/8"	2"	Round	—	———	0	Melin Tool	3213A162	00000
5/8"	3/8"	2 1/4"	Round	—	———	0	Melin Tool	3213A172	00000
3/4"	1/2"	2 3/4"	Round	—	———	0	Melin Tool	3213A182	00000
7/8"	1/2"	2 3/4"	Round	—	———	0	Melin Tool	3213A192	00000
1"	1/2"	2 3/4"	Round	—	———	0	Melin Tool	3213A212	00000
1 1/4"	1/2"	3"	Round	—	———	0	Melin Tool	3213A222	000000



90° Countersink Angle
1/8"	1/8"	1 1/2"	Round	—	———	0	Melin Tool	3213A113	00000
3/16"	3/16"	1 1/2"	Round	—	———	0	Melin Tool	3213A123	00000
1/4"	1/4"	2"	Round	—	———	0	Melin Tool	3213A133	00000
5/16"	1/4"	2"	Round	—	———	0	Melin Tool	3213A143	00000
3/8"	1/4"	2"	Round	—	———	0	Melin Tool	3213A153	00000
1/2"	3/8"	2"	Round	—	———	0	Melin Tool	3213A163	00000
5/8"	3/8"	2 1/4"	Round	—	———	0	Melin Tool	3213A173	00000
3/4"	1/2"	2 3/4"	Round	—	———	0	Melin Tool	3213A183	00000
7/8"	1/2"	2 3/4"	Round	—	———	0	Melin Tool	3213A193	00000
1"	1/2"	2 3/4"	Round	—	———	0	Melin Tool	3213A213	00000
1 1/4"	1/2"	3"	Round	—	———	0	Melin Tool	3213A223	000000

Precise-Cutting Countersinks for Screws

The go-to countersinks for CNC machining and other high-volume, high-precision jobs. Ground in the U.S. to a tight tolerance of 0" to 0.001", they cut dozens or even hundreds of countersunk holes with the same depth, diameter, and clean finish every time.

High-Speed Steel

6 Flutes

These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.						Uncoated
	Body	Shank	For Min. Hole Dia.	Overall Lg.	Shank Type	Diameter Tolerance	Mfr.		Each
6 Flutes







				82° Countersink Angle

				1/4"	1/4"	0.046"	2"	Round	0" to 0.001"	Melin Tool	3214A121	000000


				3/8"	1/4"	0.078"	2"	Round	0" to 0.001"	Melin Tool	3214A141	00000
				1/2"	3/8"	0.109"	2"	Round	0" to 0.001"	Melin Tool	3214A161	00000
				5/8"	3/8"	0.125"	2 1/4"	Round	0" to 0.001"	Melin Tool	3214A181	00000
				3/4"	1/2"	0.156"	2 1/4"	Round	0" to 0.001"	Melin Tool	3214A211	00000
				1"	1/2"	0.203"	2 3/4"	Round	0" to 0.001"	Melin Tool	3214A251	00000




						90° Countersink Angle

						1/4"	1/4"	0.046"	2"	Round	0" to 0.001"	Melin Tool	3214A122	00000


						3/8"	1/4"	0.078"	2"	Round	0" to 0.001"	Melin Tool	3214A142	00000
						1/2"	3/8"	0.109"	2"	Round	0" to 0.001"	Melin Tool	3214A162	00000
						5/8"	3/8"	0.125"	2 1/4"	Round	0" to 0.001"	Melin Tool	3214A182	00000
						3/4"	1/2"	0.156"	2 1/4"	Round	0" to 0.001"	Melin Tool	3214A212	00000
						1"	1/2"	0.203"	2 3/4"	Round	0" to 0.001"	Melin Tool	3214A252	00000

Carbide

6 Flutes

The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.						Uncoated
	Body	Shank	For Min. Hole Dia.	Overall Lg.	Shank Type	Diameter Tolerance	Mfr.		Each
6 Flutes







				82° Countersink Angle

				1/4"	1/4"	0.046"	2"	Round	0" to 0.001"	Melin Tool	3308A321	000000


				3/8"	1/4"	0.078"	2 1/2"	Round	0" to 0.001"	Melin Tool	3308A341	00000
				1/2"	3/8"	0.109"	2 1/2"	Round	0" to 0.001"	Melin Tool	3308A361	00000
				5/8"	3/8"	0.125"	2 5/8"	Round	0" to 0.001"	Melin Tool	3308A381	000000
				3/4"	1/2"	0.156"	2 3/4"	Round	0" to 0.001"	Melin Tool	3308A411	000000
				1"	1/2"	0.203"	3"	Round	0" to 0.001"	Melin Tool	3308A451	000000




						90° Countersink Angle

						1/4"	1/4"	0.046"	2"	Round	0" to 0.001"	Melin Tool	3308A322	00000


						3/8"	1/4"	0.078"	2 1/2"	Round	0" to 0.001"	Melin Tool	3308A342	00000
						1/2"	3/8"	0.109"	2 1/2"	Round	0" to 0.001"	Melin Tool	3308A362	00000
						5/8"	3/8"	0.125"	2 5/8"	Round	0" to 0.001"	Melin Tool	3308A382	000000
						3/4"	1/2"	0.156"	2 3/4"	Round	0" to 0.001"	Melin Tool	3308A412	000000
						1"	1/2"	0.203"	3"	Round	0" to 0.001"	Melin Tool	3308A452	000000

Fluteless Smooth-Finish Countersinks for Screws

With a hollow body and single cutting edge, these countersinks make less contact with the hole than solid-body countersinks. The reduced friction minimizes vibration and leaves a more accurate, tight-fitting recess for your screw head.

Cobalt Steel

0 Flutes

Tough and wear resistant, these countersinks last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without chipping on hard materials, such as nickel.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

		Dia.				Uncoated
	For Hole Dia.	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each
0 Flutes







				82° Countersink Angle

				13/64" to 27/64"	7/16"	1/4"	2 1/32"	Round	Melin Tool	2724A122	000000


				5/16" to 17/32"	9/16"	1/4"	2"	Round	Melin Tool	2724A132	00000
				1/2" to 25/32"	13/16"	1/2"	2 5/8"	Round	Melin Tool	2724A142	00000
				3/4" to 1 3/32"	1 1/8"	1/2"	2 7/8"	Round	Melin Tool	2724A152	00000




						90° Countersink Angle

						13/64" to 27/64"	7/16"	1/4"	2 1/32"	Round	Melin Tool	2724A123	00000


						5/16" to 17/32"	9/16"	1/4"	2"	Round	Melin Tool	2724A133	00000
						1/2" to 25/32"	13/16"	1/2"	2 5/8"	Round	Melin Tool	2724A143	00000
						3/4" to 1 3/32"	1 1/8"	1/2"	2 7/8"	Round	Melin Tool	2724A153	00000

Countersinks for Rivets

Cut a cone-shaped opening in a hole to install your rivet flush with the surface. The 100°, 110°, and 120° countersink angles are compatible with standard rivet heads.

High-Speed Steel

3 Flutes

These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.

Titanium Nitride (TiN) Coated—Withstand heat, corrosion, and abrasion better than uncoated and black oxide countersinks, so they stay sharp over longer periods.

Number of Flutes—Countersinks with fewer flutes reduce chatter, so you can run them at high speeds. Countersinks with a higher number of flutes remove more material per revolution, leaving a smoother finish and extending tool life.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.				Titanium Nitride (TiN) Coated
	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each
3 Flutes







				100° Countersink Angle

				1/4"	1/4"	2"	Round	Melin Tool	3210A414	000000


				3/8"	1/4"	2"	Round	Melin Tool	3210A424	00000
				1/2"	3/8"	2"	Round	Melin Tool	3210A434	00000
				5/8"	3/8"	2 1/4"	Round	Melin Tool	3210A444	00000
				3/4"	1/2"	2 3/4"	Round	Melin Tool	3210A454	00000
				1"	1/2"	2 3/4"	Round	Melin Tool	3210A464	00000




						120° Countersink Angle

						1/4"	1/4"	2"	Round	Melin Tool	3210A415	00000


						3/8"	1/4"	2"	Round	Melin Tool	3210A425	00000
						1/2"	3/8"	2"	Round	Melin Tool	3210A435	00000
						5/8"	3/8"	2 1/4"	Round	Melin Tool	3210A445	00000
						3/4"	1/2"	2 3/4"	Round	Melin Tool	3210A455	00000
						1"	1/2"	2 3/4"	Round	Melin Tool	3210A465	00000

Cobalt Steel

Tough and wear resistant, these countersinks last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without chipping on hard materials, such as nickel.

Titanium Nitride (TiN) Coated—Withstand heat, corrosion, and abrasion better than uncoated and black oxide countersinks, so they stay sharp over longer periods.

Number of Flutes—Countersinks with fewer flutes reduce chatter, so you can run them at high speeds. Countersinks with a higher number of flutes remove more material per revolution, leaving a smoother finish and extending tool life.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.				Uncoated			Titanium Nitride (TiN) Coated
	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each	Mfr.		Each
1 Flute







				100° Countersink Angle

				3/16"	3/16"	1 1/2"	Round	—	———	0	Melin Tool	3213A324	000000


				1/4"	1/4"	2"	Round	Melin Tool	3285A334	000000	Melin Tool	3213A334	00000
				3/8"	1/4"	2"	Round	Melin Tool	3285A344	00000	Melin Tool	3213A344	00000
				1/2"	3/8"	2"	Round	Melin Tool	3285A354	00000	Melin Tool	3213A354	00000
				5/8"	3/8"	2 1/4"	Round	Melin Tool	3285A364	00000	Melin Tool	3213A364	00000
				3/4"	1/2"	2 3/4"	Round	Melin Tool	3285A374	00000	Melin Tool	3213A374	00000
				1"	1/2"	2 3/4"	Round	—	———	0	Melin Tool	3213A384	00000




						120° Countersink Angle

						1/8"	1/8"	1 1/2"	Round	—	———	0	Melin Tool	3213A315	00000


						1/4"	1/4"	2"	Round	Melin Tool	3285A335	00000	Melin Tool	3213A335	00000
						3/8"	1/4"	2"	Round	Melin Tool	3285A345	00000	Melin Tool	3213A345	00000
						1/2"	3/8"	2"	Round	Melin Tool	3285A355	00000	Melin Tool	3213A355	00000
						5/8"	3/8"	2 1/4"	Round	Melin Tool	3285A365	00000	Melin Tool	3213A365	00000
						3/4"	1/2"	2 3/4"	Round	Melin Tool	3285A375	00000	—	———	0
						1 1/2"	3/4"	3 1/2"	Round	—	———	0	Melin Tool	3213A415	000000
						1 3/4"	3/4"	4 1/4"	Round	—	———	0	Melin Tool	3213A425	000000


						3 Flutes







										100° Countersink Angle

										1/4"	1/4"	2"	Round	Melin Tool	3285A444	00000	Melin Tool	3213A514	00000


										3/8"	1/4"	2"	Round	Melin Tool	3285A454	00000	Melin Tool	3213A524	00000
										1/2"	3/8"	2"	Round	Melin Tool	3285A464	00000	Melin Tool	3213A534	00000
										5/8"	3/8"	2 1/4"	Round	Melin Tool	3285A474	00000	Melin Tool	3213A544	00000
										3/4"	1/2"	2 3/4"	Round	Melin Tool	3285A484	00000	Melin Tool	3213A554	00000
										1"	1/2"	2 3/4"	Round	Melin Tool	3285A494	00000	Melin Tool	3213A564	00000




												120° Countersink Angle

												1/4"	1/4"	2"	Round	Melin Tool	3285A445	00000	Melin Tool	3213A515	00000


												3/8"	1/4"	2"	Round	Melin Tool	3285A455	00000	Melin Tool	3213A525	00000
1/2"												3/8"	2"	Round	Melin Tool	3285A465	00000	Melin Tool	3213A535	00000
5/8"	3/8"											2 1/4"	Round	Melin Tool	3285A475	00000	Melin Tool	3213A545	00000
3/4"	1/2"											2 3/4"	Round	—	———	0	Melin Tool	3213A555	00000
1"	1/2"											2 3/4"	Round	—	———	0	Melin Tool	3213A565	00000


6 Flutes







												100° Countersink Angle

												1/4"	1/4"	2"	Round	—	———	0	Melin Tool	3213A134	00000


												5/16"	1/4"	2"	Round	—	———	0	Melin Tool	3213A144	00000
												3/8"	1/4"	2"	Round	—	———	0	Melin Tool	3213A154	00000
				1/2"								3/8"	2"	Round	—	———	0	Melin Tool	3213A164	00000
				5/8"	3/8"							2 1/4"	Round	—	———	0	Melin Tool	3213A174	00000
				3/4"	1/2"							2 3/4"	Round	—	———	0	Melin Tool	3213A184	00000
				7/8"	1/2"							2 3/4"	Round	—	———	0	Melin Tool	3213A194	00000
				1"	1/2"							2 3/4"	Round	—	———	0	Melin Tool	3213A214	00000




												110° Countersink Angle

												1/4"	1/4"	2"	Round	—	———	0	Melin Tool	3213A135	00000


												5/16"	1/4"	2"	Round	—	———	0	Melin Tool	3213A145	00000
												3/8"	1/4"	2"	Round	—	———	0	Melin Tool	3213A155	00000
												1/2"	3/8"	2"	Round	—	———	0	Melin Tool	3213A165	00000
						5/8"						3/8"	2 1/4"	Round	—	———	0	Melin Tool	3213A175	00000
						1"	1/2"					2 3/4"	Round	—	———	0	Melin Tool	3213A215	00000




								120° Countersink Angle

								1/8"	1/8"			1 1/2"	Round	—	———	0	Melin Tool	3213A116	00000


								3/16"	3/16"			1 1/2"	Round	—	———	0	Melin Tool	3213A126	00000
								1/4"	1/4"			2"	Round	—	———	0	Melin Tool	3213A136	00000
								5/16"	1/4"			2"	Round	—	———	0	Melin Tool	3213A146	00000
								3/8"	1/4"			2"	Round	—	———	0	Melin Tool	3213A156	00000
								1/2"	3/8"			2"	Round	—	———	0	Melin Tool	3213A166	00000
								5/8"	3/8"			2 1/4"	Round	—	———	0	Melin Tool	3213A176	00000
								3/4"	1/2"			2 3/4"	Round	—	———	0	Melin Tool	3213A186	00000
								1"	1/2"			2 3/4"	Round	—	———	0	Melin Tool	3213A216	00000

Drill-Point Countersinks for Screws

Save time by drilling a pilot hole and countersinking in a single step. These countersinks have a small drill point to drill new pilot holes topped with cone-shaped recesses for screw heads.

High-Speed Steel

4 Flutes

These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.

Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these can last 50% longer than uncoated countersinks.

Number of Flutes—Countersinks with fewer flutes reduce chatter, so you can run them at high speeds. Countersinks with a higher number of flutes remove more material per revolution, leaving a smoother finish and extending tool life.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.					Black Oxide
	Body	Shank	Drill Tip Dia.	Overall Lg.	Shank Type	Mfr.		Each
4 Flutes







				82° Countersink Angle

				1/8"	1/8"	0.041"	1 1/2"	Round	Melin Tool	27535A33	000000


				3/16"	3/16"	0.062"	1 1/2"	Round	Melin Tool	27535A34	00000
				1/4"	1/4"	0.082"	2"	Round	Melin Tool	27535A35	00000
				5/16"	1/4"	0.104"	2"	Round	Melin Tool	27535A36	00000
				3/8"	1/4"	0.125"	2"	Round	Melin Tool	27535A37	00000
				1/2"	3/8"	0.167"	2"	Round	Melin Tool	27535A38	00000
				5/8"	3/8"	0.208"	2 1/4"	Round	Melin Tool	27535A39	00000
				3/4"	1/2"	0.250"	2 3/4"	Round	Melin Tool	27535A41	00000
				7/8"	1/2"	0.291"	2 3/4"	Round	Melin Tool	27535A42	00000
				1"	1/2"	0.333"	2 3/4"	Round	Melin Tool	27535A43	00000




						90° Countersink Angle

						1/8"	1/8"	0.041"	1 1/2"	Round	Melin Tool	27535A44	00000


						3/16"	3/16"	0.062"	1 1/2"	Round	Melin Tool	27535A45	00000
						1/4"	1/4"	0.082"	2"	Round	Melin Tool	27535A46	00000
						5/16"	1/4"	0.104"	2"	Round	Melin Tool	27535A47	00000
						3/8"	1/4"	0.125"	2"	Round	Melin Tool	27535A48	00000
						1/2"	3/8"	0.167"	2"	Round	Melin Tool	27535A49	00000
						5/8"	3/8"	0.208"	2 1/4"	Round	Melin Tool	27535A51	00000
						3/4"	1/2"	0.250"	2 3/4"	Round	Melin Tool	27535A52	00000
						7/8"	1/2"	0.291"	2 3/4"	Round	Melin Tool	27535A53	00000
						1"	1/2"	0.333"	2 3/4"	Round	Melin Tool	27535A54	00000

Countersinks with Two Countersinking Ends for Screws

When one end starts to wear, flip the tool around for a fresh cutting edge.

High-Speed Steel

These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.

Number of Flutes—Countersinks with fewer flutes reduce chatter, so you can run them at high speeds. Countersinks with a higher number of flutes remove more material per revolution, leaving a smoother finish and extending tool life.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.				Uncoated
	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each
1 Flute







				82° Countersink Angle

				1/8"	1/8"	1 1/2"	Round	Melin Tool	27885A911	000000


				3/16"	3/16"	2"	Round	Melin Tool	27885A912	00000
				1/4"	1/4"	2"	Round	Melin Tool	27885A913	00000
				5/16"	5/16"	2 1/2"	Round	Melin Tool	27885A914	00000
				3/8"	3/8"	2 1/2"	Round	Melin Tool	27885A915	00000
				1/2"	1/2"	3"	Round	Melin Tool	27885A916	00000
				5/8"	5/8"	3 1/2"	Round	Melin Tool	27885A917	00000




						90° Countersink Angle

						1/8"	1/8"	1 1/2"	Round	Melin Tool	27885A918	00000


						3/16"	3/16"	2"	Round	Melin Tool	27885A919	00000
						1/4"	1/4"	2"	Round	Melin Tool	27885A921	00000
						5/16"	5/16"	2 1/2"	Round	Melin Tool	27885A922	00000
						3/8"	3/8"	2 1/2"	Round	Melin Tool	27885A923	00000
						1/2"	1/2"	3"	Round	Melin Tool	27885A924	00000


						6 Flutes







										82° Countersink Angle

										1/8"	1/8"	1 1/2"	Round	Melin Tool	27885A31	00000


										3/16"	3/16"	2"	Round	Melin Tool	27885A32	00000
										1/4"	1/4"	2"	Round	Melin Tool	27885A33	00000
										5/16"	5/16"	2 1/2"	Round	Melin Tool	27885A34	00000
										3/8"	3/8"	2 1/2"	Round	Melin Tool	27885A35	00000
										1/2"	1/2"	3"	Round	Melin Tool	27885A36	00000
										5/8"	5/8"	3 1/2"	Round	Melin Tool	27885A37	00000
										3/4"	3/4"	4"	Round	Melin Tool	27885A38	00000




												90° Countersink Angle

												1/8"	1/8"	1 1/2"	Round	Melin Tool	27885A41	00000


												3/16"	3/16"	2"	Round	Melin Tool	27885A42	00000
1/4"												1/4"	2"	Round	Melin Tool	27885A43	00000
5/16"	5/16"											2 1/2"	Round	Melin Tool	27885A44	00000
3/8"	3/8"											2 1/2"	Round	Melin Tool	27885A45	00000
1/2"	1/2"											3"	Round	Melin Tool	27885A46	00000
5/8"	5/8"											3 1/2"	Round	Melin Tool	27885A47	00000
3/4"	3/4"	4"										Round	Melin Tool	27885A48	00000

Carbide

6 Flutes

The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.

Number of Flutes—Countersinks with fewer flutes reduce chatter, so you can run them at high speeds. Countersinks with a higher number of flutes remove more material per revolution, leaving a smoother finish and extending tool life.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.				Uncoated
	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each
6 Flutes







				82° Countersink Angle

				1/8"	1/8"	1 1/2"	Round	Melin Tool	27655A31	000000


				3/16"	3/16"	2"	Round	Melin Tool	27655A32	00000
				1/4"	1/4"	2"	Round	Melin Tool	27655A33	00000
				5/16"	5/16"	2 1/2"	Round	Melin Tool	27655A34	00000
				3/8"	3/8"	2 1/2"	Round	Melin Tool	27655A35	00000
				1/2"	1/2"	3"	Round	Melin Tool	27655A36	000000
				5/8"	5/8"	3 1/2"	Round	Melin Tool	27655A37	000000
				3/4"	3/4"	4"	Round	Melin Tool	27655A38	000000




						90° Countersink Angle

						1/8"	1/8"	1 1/2"	Round	Melin Tool	27655A41	00000


						3/16"	3/16"	2"	Round	Melin Tool	27655A42	00000
						1/4"	1/4"	2"	Round	Melin Tool	27655A43	00000
						5/16"	5/16"	2 1/2"	Round	Melin Tool	27655A44	00000
						3/8"	3/8"	2 1/2"	Round	Melin Tool	27655A45	00000
						1/2"	1/2"	3"	Round	Melin Tool	27655A46	000000
						5/8"	5/8"	3 1/2"	Round	Melin Tool	27655A47	000000
						3/4"	3/4"	4"	Round	Melin Tool	27655A48	000000

Long-Reach Countersinks for Screws

At around twice the length of our standard countersinks, these give you access to hard-to-reach holes. They're more prone to wobbling than shorter countersinks, so consider using a drill press or other rigid tool setup.

High-Speed Steel

These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.

Number of Flutes—Countersinks with fewer flutes reduce chatter, so you can run them at high speeds. Countersinks with a higher number of flutes remove more material per revolution, leaving a smoother finish and extending tool life.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.				Uncoated
	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each
1 Flute







				82° Countersink Angle

				1/8"	1/8"	4"	Round	Melin Tool	3172A11	000000


				3/16"	3/16"	4"	Round	Melin Tool	3172A12	00000
				1/4"	1/4"	6"	Round	Melin Tool	3172A13	00000
				5/16"	5/16"	6"	Round	Melin Tool	3172A14	00000
				3/8"	3/8"	6"	Round	Melin Tool	3172A15	00000
				1/2"	3/8"	6"	Round	Melin Tool	3172A16	00000
				5/8"	3/8"	6"	Round	Melin Tool	3172A17	00000
				3/4"	1/2"	6"	Round	Melin Tool	3172A18	00000
				1"	1/2"	6"	Round	Melin Tool	3172A19	00000


				6 Flutes







								82° Countersink Angle

								1/8"	1/8"	4"	Round	Melin Tool	3195A21	00000


								3/16"	3/16"	4"	Round	Melin Tool	3195A22	00000
								1/4"	1/4"	6"	Round	Melin Tool	3195A23	00000
								5/16"	5/16"	6"	Round	Melin Tool	3195A24	00000
								3/8"	3/8"	6"	Round	Melin Tool	3195A25	00000
								1/2"	3/8"	6"	Round	Melin Tool	3195A26	00000
								5/8"	3/8"	6"	Round	Melin Tool	3195A27	00000
								3/4"	1/2"	6"	Round	Melin Tool	3195A28	00000
								1"	1/2"	6"	Round	Melin Tool	3195A29	000000

Drill-Point Countersinks with Two Countersinking Ends for Screws

When one end starts to wear, flip the tool around for a fresh cutting edge. These countersinks save time by drilling a pilot hole and countersinking in a single step. They have a small drill point to drill new pilot holes topped with cone-shaped recesses for screw heads.

Carbide

4 Flutes

The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.					Uncoated
	Body	Shank	Drill Tip Dia.	Overall Lg.	Shank Type	Mfr.		Each
4 Flutes







				82° Countersink Angle

				1/8"	1/8"	0.041"	1 1/2"	Round	Melin Tool	3290A512	000000


				3/16"	3/16"	0.062"	2"	Round	Melin Tool	3290A522	00000
				1/4"	1/4"	0.082"	2"	Round	Melin Tool	3290A532	00000
				5/16"	5/16"	0.104"	2 1/2"	Round	Melin Tool	3290A542	00000
				3/8"	3/8"	0.125"	2 1/2"	Round	Melin Tool	3290A552	00000
				1/2"	1/2"	0.167"	3"	Round	Melin Tool	3290A562	000000
				5/8"	5/8"	0.208"	3 1/2"	Round	Melin Tool	3290A572	000000




						90° Countersink Angle

						1/8"	1/8"	0.041"	1 1/2"	Round	Melin Tool	3290A513	00000


						3/16"	3/16"	0.062"	2"	Round	Melin Tool	3290A523	00000
						1/4"	1/4"	0.082"	2"	Round	Melin Tool	3290A533	00000
						5/16"	5/16"	0.104"	2 1/2"	Round	Melin Tool	3290A543	00000
						3/8"	3/8"	0.125"	2 1/2"	Round	Melin Tool	3290A553	00000
						1/2"	1/2"	0.167"	3"	Round	Melin Tool	3290A563	000000
						5/8"	5/8"	0.208"	3 1/2"	Round	Melin Tool	3290A573	000000
						3/4"	3/4"	0.250"	4"	Round	Melin Tool	3290A583	000000

Drill-Point Countersinks for Rivets

Save time by drilling a pilot hole and countersinking in a single step. These countersinks have a small drill point to drill new pilot holes topped with cone-shaped recesses for rivet heads.

High-Speed Steel

These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.

Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these can last 50% longer than uncoated countersinks.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.					Black Oxide
	Body	Shank	Drill Tip Dia.	Overall Lg.	Shank Type	Mfr.		Each
4 Flutes







				100° Countersink Angle

				1/8"	1/8"	0.041"	1 1/2"	Round	Melin Tool	27535A55	000000


				3/16"	3/16"	0.062"	1 1/2"	Round	Melin Tool	27535A56	00000
				1/4"	1/4"	0.082"	2"	Round	Melin Tool	27535A57	00000
				5/16"	1/4"	0.104"	2"	Round	Melin Tool	27535A58	00000
				3/8"	1/4"	0.125"	2"	Round	Melin Tool	27535A59	00000
				1/2"	3/8"	0.167"	2"	Round	Melin Tool	27535A61	00000
				5/8"	3/8"	0.208"	2 1/4"	Round	Melin Tool	27535A62	00000
				3/4"	1/2"	0.250"	2 3/4"	Round	Melin Tool	27535A63	00000
				7/8"	1/2"	0.291"	2 3/4"	Round	Melin Tool	27535A64	00000
				1"	1/2"	0.333"	2 3/4"	Round	Melin Tool	27535A65	00000




						120° Countersink Angle

						1/8"	1/8"	0.041"	1 1/2"	Round	Melin Tool	27535A77	00000


						3/16"	3/16"	0.062"	1 1/2"	Round	Melin Tool	27535A78	00000
						1/4"	1/4"	0.082"	2"	Round	Melin Tool	27535A79	00000
						5/16"	1/4"	0.104"	2"	Round	Melin Tool	27535A81	00000
						3/8"	1/4"	0.125"	2"	Round	Melin Tool	27535A82	00000
						1/2"	3/8"	0.167"	2"	Round	Melin Tool	27535A83	00000
						5/8"	3/8"	0.208"	2 1/4"	Round	Melin Tool	27535A84	00000
						3/4"	1/2"	0.250"	2 3/4"	Round	Melin Tool	27535A85	00000
						1"	1/2"	0.333"	2 3/4"	Round	Melin Tool	27535A87	00000

Countersinks with Two Countersinking Ends for Rivets

When one end starts to wear, flip the tool around for a fresh cutting edge.

High-Speed Steel

6 Flutes

These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.				Uncoated
	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each
6 Flutes







				100° Countersink Angle

				1/8"	1/8"	1 1/2"	Round	Melin Tool	27885A51	000000


				3/16"	3/16"	2"	Round	Melin Tool	27885A56	00000
				1/4"	1/4"	2"	Round	Melin Tool	27885A53	00000
				5/16"	5/16"	2 1/2"	Round	Melin Tool	27885A54	00000
				3/8"	3/8"	2 1/2"	Round	Melin Tool	27885A55	00000
				1/2"	1/2"	3"	Round	Melin Tool	27885A86	00000
				5/8"	5/8"	3 1/2"	Round	Melin Tool	27885A57	00000
				3/4"	3/4"	4"	Round	Melin Tool	27885A58	00000




						120° Countersink Angle

						1/8"	1/8"	1 1/2"	Round	Melin Tool	27885A71	00000


						3/16"	3/16"	2"	Round	Melin Tool	27885A72	00000
						1/4"	1/4"	2"	Round	Melin Tool	27885A73	00000
						5/16"	5/16"	2 1/2"	Round	Melin Tool	27885A74	00000
						3/8"	3/8"	2 1/2"	Round	Melin Tool	27885A75	00000
						1/2"	1/2"	3"	Round	Melin Tool	27885A76	00000

Carbide

6 Flutes

The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.				Uncoated
	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each
6 Flutes







				100° Countersink Angle

				1/8"	1/8"	1 1/2"	Round	Melin Tool	27655A51	000000


				3/16"	3/16"	2"	Round	Melin Tool	27655A52	00000
				1/4"	1/4"	2"	Round	Melin Tool	27655A53	00000
				5/16"	5/16"	2 1/2"	Round	Melin Tool	27655A54	00000
				3/8"	3/8"	2 1/2"	Round	Melin Tool	27655A55	00000
				1/2"	1/2"	3"	Round	Melin Tool	27655A56	000000




						120° Countersink Angle

						1/8"	1/8"	1 1/2"	Round	Melin Tool	27655A71	00000


						3/16"	3/16"	2"	Round	Melin Tool	27655A72	00000
						1/4"	1/4"	2"	Round	Melin Tool	27655A73	00000
						5/16"	5/16"	2 1/2"	Round	Melin Tool	27655A74	00000
						3/8"	3/8"	2 1/2"	Round	Melin Tool	27655A75	00000
						1/2"	1/2"	3"	Round	Melin Tool	27655A76	000000
						5/8"	5/8"	3 1/2"	Round	Melin Tool	27655A77	000000
						3/4"	3/4"	4"	Round	Melin Tool	27655A78	000000

Precise-Cutting Countersinks for Rivets

The go-to countersinks for CNC machining and other high-volume, high-precision jobs. Ground in the U.S. to a tight tolerance of 0" to 0.001", they cut dozens or even hundreds of countersunk holes with the same depth, diameter, and clean finish every time.

High-Speed Steel

6 Flutes

These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.						Uncoated
	Body	Shank	For Min. Hole Dia.	Overall Lg.	Shank Type	Diameter Tolerance	Mfr.		Each
6 Flutes







				100° Countersink Angle

				1/4"	1/4"	0.046"	2"	Round	0" to 0.001"	Melin Tool	3214A123	000000


				3/8"	1/4"	0.078"	2"	Round	0" to 0.001"	Melin Tool	3214A143	00000
				1/2"	3/8"	0.109"	2"	Round	0" to 0.001"	Melin Tool	3214A163	00000
				5/8"	3/8"	1/8"	2 1/4"	Round	0" to 0.001"	Melin Tool	3214A183	00000
				3/4"	1/2"	0.156"	2 1/4"	Round	0" to 0.001"	Melin Tool	3214A213	00000
				1"	1/2"	0.203"	2 3/4"	Round	0" to 0.001"	Melin Tool	3214A253	00000

Carbide

6 Flutes

The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.						Uncoated
	Body	Shank	For Min. Hole Dia.	Overall Lg.	Shank Type	Diameter Tolerance	Mfr.		Each
6 Flutes







				100° Countersink Angle

				1/4"	1/4"	0.046"	2"	Round	0" to 0.001"	Melin Tool	3308A323	000000


				3/8"	1/4"	0.078"	2 1/2"	Round	0" to 0.001"	Melin Tool	3308A343	00000
				1/2"	3/8"	0.109"	2 1/2"	Round	0" to 0.001"	Melin Tool	3308A363	00000
				5/8"	3/8"	1/8"	2 5/8"	Round	0" to 0.001"	Melin Tool	3308A383	000000
				3/4"	1/2"	0.156"	2 3/4"	Round	0" to 0.001"	Melin Tool	3308A413	000000
				1"	1/2"	0.203"	3"	Round	0" to 0.001"	Melin Tool	3308A453	000000

Countersinks for Lathe Centers

Keep your workpiece aligned as it spins between lathe centers. These countersinks match the 60° angle on both rotating and stationary centers.

High-Speed Steel

3 Flutes

These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.

Titanium Nitride (TiN) Coated—Withstand heat, corrosion, and abrasion better than uncoated and black oxide countersinks, so they stay sharp over longer periods.

Number of Flutes—Countersinks with fewer flutes reduce chatter, so you can run them at high speeds. Countersinks with a higher number of flutes remove more material per revolution, leaving a smoother finish and extending tool life.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.				Titanium Nitride (TiN) Coated
	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each
3 Flutes







				60° Countersink Angle

				1/4"	1/4"	2"	Round	Melin Tool	3210A411	000000


				3/8"	1/4"	2"	Round	Melin Tool	3210A421	00000
				1/2"	3/8"	2"	Round	Melin Tool	3210A431	00000
				5/8"	3/8"	2 1/4"	Round	Melin Tool	3210A441	00000
				3/4"	1/2"	2 3/4"	Round	Melin Tool	3210A451	00000
				1"	1/2"	2 3/4"	Round	Melin Tool	3210A461	00000

Cobalt Steel

Tough and wear resistant, these countersinks last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without chipping on hard materials, such as nickel.

Titanium Nitride (TiN) Coated—Withstand heat, corrosion, and abrasion better than uncoated and black oxide countersinks, so they stay sharp over longer periods.

Number of Flutes—Countersinks with fewer flutes reduce chatter, so you can run them at high speeds. Countersinks with a higher number of flutes remove more material per revolution, leaving a smoother finish and extending tool life.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.				Uncoated			Titanium Nitride (TiN) Coated
	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each	Mfr.		Each
1 Flute







				60° Countersink Angle

				1/8"	1/8"	1 1/2"	Round	Melin Tool	3285A311	000000	Melin Tool	3213A311	000000


				3/16"	3/16"	1 1/2"	Round	—	———	0	Melin Tool	3213A321	00000
				1/4"	1/4"	2"	Round	Melin Tool	3285A331	00000	Melin Tool	3213A331	00000
				3/8"	1/4"	2"	Round	Melin Tool	3285A341	00000	Melin Tool	3213A341	00000
				1/2"	3/8"	2"	Round	Melin Tool	3285A351	00000	Melin Tool	3213A351	00000
				5/8"	3/8"	2 1/4"	Round	Melin Tool	3285A361	00000	Melin Tool	3213A361	00000
				3/4"	1/2"	2 3/4"	Round	Melin Tool	3285A371	00000	Melin Tool	3213A371	00000
				1"	1/2"	2 3/4"	Round	Melin Tool	3285A381	00000	Melin Tool	3213A381	00000
				1 1/4"	1/2"	3"	Round	—	———	0	Melin Tool	3213A391	000000
				1 1/2"	3/4"	3 1/2"	Round	—	———	0	Melin Tool	3213A411	000000
				2"	3/4"	3 3/4"	Round	—	———	0	Melin Tool	3213A431	000000


				3 Flutes







								60° Countersink Angle

								1/4"	1/4"	2"	Round	Melin Tool	3285A441	00000	Melin Tool	3213A511	00000


								3/8"	1/4"	2"	Round	Melin Tool	3285A451	00000	Melin Tool	3213A521	00000
								1/2"	3/8"	2"	Round	Melin Tool	3285A461	00000	Melin Tool	3213A531	00000
								5/8"	3/8"	2 1/4"	Round	Melin Tool	3285A471	00000	Melin Tool	3213A541	00000
								3/4"	1/2"	2 3/4"	Round	Melin Tool	3285A481	00000	Melin Tool	3213A551	00000
								1"	1/2"	2 3/4"	Round	Melin Tool	3285A491	00000	Melin Tool	3213A561	00000


								6 Flutes







												60° Countersink Angle

												1/4"	1/4"	2"	Round	—	———	0	Melin Tool	3213A131	00000


												3/8"	1/4"	2"	Round	—	———	0	Melin Tool	3213A151	00000
												1/2"	3/8"	2"	Round	—	———	0	Melin Tool	3213A161	00000
												5/8"	3/8"	2 1/4"	Round	—	———	0	Melin Tool	3213A171	00000
												3/4"	1/2"	2 3/4"	Round	—	———	0	Melin Tool	3213A181	00000
												7/8"	1/2"	2 3/4"	Round	—	———	0	Melin Tool	3213A191	00000
												1"	1/2"	2 3/4"	Round	—	———	0	Melin Tool	3213A211	00000
												1 1/4"	1/2"	3"	Round	—	———	0	Melin Tool	3213A221	000000

Drill-Point Countersinks with Two Countersinking Ends for Rivets

When one end starts to wear, flip the tool around for a fresh cutting edge. These countersinks have a small drill point to drill new pilot holes topped with cone-shaped recesses for rivet heads.

Carbide

4 Flutes

The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.					Uncoated
	Body	Shank	Drill Tip Dia.	Overall Lg.	Shank Type	Mfr.		Each
4 Flutes







				100° Countersink Angle

				1/8"	1/8"	0.041"	1 1/2"	Round	Melin Tool	3290A514	000000


				3/16"	3/16"	0.062"	2"	Round	Melin Tool	3290A524	00000
				1/4"	1/4"	0.082"	2"	Round	Melin Tool	3290A534	00000
				5/16"	5/16"	0.104"	2 1/2"	Round	Melin Tool	3290A544	00000
				3/8"	3/8"	0.125"	2 1/2"	Round	Melin Tool	3290A554	00000
				1/2"	1/2"	0.167"	3"	Round	Melin Tool	3290A564	000000




						120° Countersink Angle

						1/8"	1/8"	0.041"	1 1/2"	Round	Melin Tool	3290A516	00000


						3/16"	3/16"	0.062"	2"	Round	Melin Tool	3290A526	00000
						1/4"	1/4"	0.082"	2"	Round	Melin Tool	3290A536	00000
						5/16"	5/16"	0.104"	2 1/2"	Round	Melin Tool	3290A546	00000
						3/8"	3/8"	0.125"	2 1/2"	Round	Melin Tool	3290A556	00000
						1/2"	1/2"	0.167"	3"	Round	Melin Tool	3290A566	000000
						3/4"	3/4"	0.250"	4"	Round	Melin Tool	3290A586	000000

Precise-Cutting Countersinks for Lathe Centers

The go-to countersinks for CNC machining and other high-volume, high-precision jobs. Ground in the U.S. to a tight tolerance of 0" to 0.001", they cut dozens or even hundreds of countersunk holes with the same depth, diameter, and clean finish every time.

High-Speed Steel

6 Flutes

These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.						Uncoated
	Body	Shank	For Min. Hole Dia.	Overall Lg.	Shank Type	Diameter Tolerance	Mfr.		Each
6 Flutes







				60° Countersink Angle

				1/4"	1/4"	0.078"	2"	Round	0" to 0.001"	Melin Tool	3214A11	000000


				3/8"	1/4"	1/8"	2"	Round	0" to 0.001"	Melin Tool	3214A13	00000
				1/2"	3/8"	0.156"	2"	Round	0" to 0.001"	Melin Tool	3214A15	00000
				5/8"	3/8"	0.203"	2 1/4"	Round	0" to 0.001"	Melin Tool	3214A17	00000
				3/4"	1/2"	1/4"	2 1/4"	Round	0" to 0.001"	Melin Tool	3214A19	00000
				1"	1/2"	0.328"	2 3/4"	Round	0" to 0.001"	Melin Tool	3214A24	00000

Carbide

6 Flutes

The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.						Uncoated
	Body	Shank	For Min. Hole Dia.	Overall Lg.	Shank Type	Diameter Tolerance	Mfr.		Each
6 Flutes







				60° Countersink Angle

				1/4"	1/4"	0.078"	2"	Round	0" to 0.001"	Melin Tool	3308A31	000000


				3/8"	1/4"	1/8"	2 1/2"	Round	0" to 0.001"	Melin Tool	3308A33	00000
				1/2"	3/8"	0.156"	2 1/2"	Round	0" to 0.001"	Melin Tool	3308A35	00000
				5/8"	3/8"	0.203"	2 5/8"	Round	0" to 0.001"	Melin Tool	3308A37	000000
				3/4"	1/2"	1/4"	2 3/4"	Round	0" to 0.001"	Melin Tool	3308A39	000000
				1"	1/2"	0.328"	3"	Round	0" to 0.001"	Melin Tool	3308A44	000000

Drill-Point Countersinks for Lathe Centers

No need to drill or punch a starter hole—a sharp point guides the cutting edges straight into your workpiece. The 60° angle creates a precise recess for both rotating and stationary lathe centers, so the workpiece stays aligned as it spins.

High-Speed Steel

4 Flutes

These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.

Black Oxide—The dark finish increases wear resistance and reduces friction to improve chip flow, so these can last 50% longer than uncoated countersinks.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.					Black Oxide
	Body	Shank	Drill Tip Dia.	Overall Lg.	Shank Type	Mfr.		Each
4 Flutes







				60° Countersink Angle

				1/8"	1/8"	0.041"	1 1/2"	Round	Melin Tool	27535A22	000000


				3/16"	3/16"	0.062"	1 1/2"	Round	Melin Tool	27535A23	00000
				1/4"	1/4"	0.082"	2"	Round	Melin Tool	27535A24	00000
				5/16"	1/4"	0.104"	2"	Round	Melin Tool	27535A25	00000
				3/8"	1/4"	0.125"	2"	Round	Melin Tool	27535A26	00000
				1/2"	3/8"	0.167"	2"	Round	Melin Tool	27535A27	00000
				5/8"	3/8"	0.208"	2 1/4"	Round	Melin Tool	27535A28	00000
				3/4"	1/2"	0.250"	2 3/4"	Round	Melin Tool	27535A29	00000
				7/8"	1/2"	0.291"	2 3/4"	Round	Melin Tool	27535A31	00000
				1"	1/2"	0.333"	2 3/4"	Round	Melin Tool	27535A32	00000

Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Screws

When one end starts to wear, flip the tool around for a fresh cutting edge. The hollow body minimizes vibration while lifting chips out of the hole for a smooth, accurate finish. Also known as zero-flute countersinks.

Cobalt Steel

0 Flutes

Tough and wear resistant, these countersinks last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without chipping on hard materials, such as nickel.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

		Dia.				Uncoated
	For Hole Dia.	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each
0 Flutes







				82° Countersink Angle

				3/32" to 15/64"	1/4"	1/4"	1 1/2"	Round	Melin Tool	2724A112	000000




						90° Countersink Angle

						3/32" to 15/64"	1/4"	1/4"	1 1/2"	Round	Melin Tool	2724A113	00000

Drill-Point Countersinks with Two Countersinking Ends for Lathe Centers

When one end starts to wear, flip the tool around for a fresh cutting edge. A sharp point on these countersinks guides the cutting edges straight into your workpiece, so you don't have to drill or punch a starter hole first. The 60° angle creates a precise recess for both rotating and stationary lathe centers, keeping the workpiece aligned as it spins.

Carbide

4 Flutes

The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.					Uncoated
	Body	Shank	Drill Tip Dia.	Overall Lg.	Shank Type	Mfr.		Each
4 Flutes







				60° Countersink Angle

				1/8"	1/8"	0.041"	1 1/2"	Round	Melin Tool	3290A511	000000


				3/16"	3/16"	0.062"	2"	Round	Melin Tool	3290A521	00000
				1/4"	1/4"	0.082"	2"	Round	Melin Tool	3290A531	00000
				5/16"	5/16"	0.104"	2 1/2"	Round	Melin Tool	3290A541	00000
				3/8"	3/8"	0.125"	2 1/2"	Round	Melin Tool	3290A551	00000
				1/2"	1/2"	0.167"	3"	Round	Melin Tool	3290A561	000000
				3/4"	3/4"	0.250"	4"	Round	Melin Tool	3290A581	000000

Countersinks with Two Countersinking Ends for Lathe Centers

When one end starts to wear, flip the tool around for a fresh cutting edge. These countersinks cut a profiled recess for your lathe center to keep the workpiece aligned as it spins. They match the 60° angle on both rotating and stationary centers.

High-Speed Steel

6 Flutes

These versatile, wear-resistant countersinks cut cleanly in most materials, including plastic, aluminum, and steel.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.				Uncoated
	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each
6 Flutes







				60° Countersink Angle

				1/8"	1/8"	1 1/2"	Round	Melin Tool	27885A21	000000


				3/16"	3/16"	2"	Round	Melin Tool	27885A22	00000
				1/4"	1/4"	2"	Round	Melin Tool	27885A23	00000
				5/16"	5/16"	2 1/2"	Round	Melin Tool	27885A24	00000
				3/8"	3/8"	2 1/2"	Round	Melin Tool	27885A25	00000
				1/2"	1/2"	3"	Round	Melin Tool	27885A26	00000
				5/8"	5/8"	3 1/2"	Round	Melin Tool	27885A27	00000
				3/4"	3/4"	4"	Round	Melin Tool	27885A28	00000

Carbide

6 Flutes

The hardest and most wear-resistant countersinks you can buy. They stay sharp at high temperatures and faster speeds for the best performance on hard and difficult-to-machine materials. They last 10 to 20 times longer than their closest alternative, cobalt steel. Carbide can be brittle, however, so use a rigid machine tool holder to prevent breakage.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

	Dia.				Uncoated
	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each
6 Flutes







				60° Countersink Angle

				1/8"	1/8"	1 1/2"	Round	Melin Tool	27655A21	000000


				3/16"	3/16"	2"	Round	Melin Tool	27655A22	00000
				1/4"	1/4"	2"	Round	Melin Tool	27655A23	00000
				5/16"	5/16"	2 1/2"	Round	Melin Tool	27655A24	00000
				3/8"	3/8"	2 1/2"	Round	Melin Tool	27655A25	00000
				1/2"	1/2"	3"	Round	Melin Tool	27655A26	000000
				5/8"	5/8"	3 1/2"	Round	Melin Tool	27655A27	000000
				3/4"	3/4"	4"	Round	Melin Tool	27655A28	000000

Fluteless Smooth-Finish Countersinks for Lathe Centers

With a hollow body and single cutting edge, these countersinks make less contact with the hole than solid-body countersinks. The reduced friction minimizes vibration and leaves a more accurate, tight-fitting recess for your screw head.

Cobalt Steel

0 Flutes

Tough and wear resistant, these countersinks last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without chipping on hard materials, such as nickel.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

		Dia.				Uncoated
	For Hole Dia.	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each
0 Flutes







				60° Countersink Angle

				13/64" to 27/64"	7/16"	1/4"	2 1/32"	Round	Melin Tool	2724A121	000000


				5/16" to 17/32"	9/16"	1/4"	2"	Round	Melin Tool	2724A131	00000
				1/2" to 25/32"	13/16"	1/2"	2 5/8"	Round	Melin Tool	2724A141	00000
				3/4" to 1 3/32"	1 1/8"	1/2"	2 7/8"	Round	Melin Tool	2724A151	00000

Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Lathe Centers

When one end starts to wear, flip the tool around for a fresh cutting edge. The hollow body minimizes vibration while lifting chips out of the hole for a smooth, accurate finish. Also known as zero-flute countersinks.

Cobalt Steel

Tough and wear resistant, these countersinks last at least twice as long as high-speed steel. They can also run up to 25% faster at higher temperatures without chipping on hard materials, such as nickel.

Manufacturer—We source from trusted manufacturers who vet raw materials for purity and use diamond grinding wheels to machine precise edges. This keeps cutting surfaces smooth and free of microscopic burrs. Because our suppliers clean their wheels more often than other manufacturers, each countersink is consistently ground to create uniform holes every time.

		Dia.				Uncoated
	For Hole Dia.	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each
0 Flutes







				60° Countersink Angle

				3/32" to 15/64"	1/4"	1/4"	1 1/2"	Round	Melin Tool	2724A111	000000

For Cutting

For Cutting

Material

Countersinks for Screws

Precise-Cutting Countersinks for Screws

Fluteless Smooth-Finish Countersinks for Screws

Countersinks for Rivets

Drill-Point Countersinks for Screws

Countersinks with Two Countersinking Ends for Screws

Long-Reach Countersinks for Screws

Drill-Point Countersinks with Two Countersinking Ends for Screws

Drill-Point Countersinks for Rivets

Countersinks with Two Countersinking Ends for Rivets

Precise-Cutting Countersinks for Rivets

Countersinks for Lathe Centers

Drill-Point Countersinks with Two Countersinking Ends for Rivets

Precise-Cutting Countersinks for Lathe Centers

Drill-Point Countersinks for Lathe Centers

Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Screws

Drill-Point Countersinks with Two Countersinking Ends for Lathe Centers

Countersinks with Two Countersinking Ends for Lathe Centers

Fluteless Smooth-Finish Countersinks for Lathe Centers

Fluteless Smooth-Finish Countersinks with Two Countersinking Ends for Lathe Centers