Precise-Cut Countersinks

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Countersink Angle

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Performance

Number of Countersinking Ends

Countersink Type

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For Cutting

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U.S.–Mexico–Canada Agreement (USMCA) Qualifying

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DFARS Specialty Metals

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Export Control Classification Number (ECCN)

EAR99

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48 Products

About Countersinks

Choose the right countersink angle, body diameter, and number of flutes for your application.

For Cutting

Screw Holes

Widen the openings of holes so flat-head screws sit flush with the surface

24 products

Rivet Holes

Widen the openings of holes so rivets sit flush with the surface

12 products

For Cutting

Lathe Center Holes

Cut a profiled recess to keep your workpiece aligned as it spins

12 products

Material

High-Speed Steel

Make accurate cuts in most materials without chipping or cracking

24 products

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.

	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

Precise-Cutting Countersinks for Rivets

High-Speed Steel

6 Flutes

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

	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

	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

Precise-Cutting Countersinks for Lathe Centers

High-Speed Steel

6 Flutes

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

	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

	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