Single-Flute Countersinks

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Aluminum Titanium Nitride (AlTiN) Coated

Titanium Aluminum Nitride (TiAlN) Coated

Titanium Carbon Nitride (TiCN) Coated

Titanium Nitride (TiN) Coated

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Body Diameters Included

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

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Number of Pieces

433 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

223 products

Rivet Holes

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

129 products

For Cutting

Lathe Center Holes

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

99 products

Material

High-Speed Steel

Make accurate cuts in most materials without chipping or cracking

154 products

Countersinks for Screws

Cut a cone-shaped opening in a hole so your flat- or oval-head screw sits flush with the surface. Choose an 82° countersink angle for inch screws or a 90° countersink angle for metric screws.

High-Speed Steel

1 Flute

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







				82° Countersink Angle

				1/8"	1/8"	1 1/4"	Round	Keo	2846A51	000000	3210A212	000000


				3/16"	3/16"	1 3/8"	Round	Keo	2846A29	00000	3210A222	00000
				1/4"	1/4"	1 1/2"	Round	Keo	2846A31	00000	3210A232	00000
				3/8"	1/4"	1 3/4"	Round	Keo	2846A32	00000	3210A242	00000
				1/2"	1/4"	2"	Round	Keo	2846A33	00000	3210A252	00000
				5/8"	3/8"	2 1/4"	Round	Keo	2846A52	00000	3210A262	00000
				3/4"	1/2"	2 5/8"	Round	Keo	2846A34	00000	3210A272	00000
				1"	1/2"	2 3/4"	Round	Keo	2846A35	00000	3210A282	00000
				1 1/4"	1/2"	2 3/4"	Round	Keo	2846A53	00000	3210A292	000000
				1 1/2"	3/4"	2 7/8"	Round	Keo	2846A54	000000	3210A312	000000
				1 3/4"	3/4"	3"	Round	Keo	2846A55	000000	3210A322	000000


				2"	3/4"	3 1/4"	Round	Keo	2846A56	000000	3210A332	000000




						90° Countersink Angle

						1/8"	1/8"	1 1/4"	Round	Keo	2846A61	00000	3210A213	00000


						3/16"	3/16"	1 3/8"	Round	Keo	2846A59	00000	3210A223	00000
						1/4"	1/4"	1 1/2"	Round	Keo	2846A36	00000	3210A233	00000
						3/8"	1/4"	1 3/4"	Round	Keo	2846A37	00000	3210A243	00000
						1/2"	1/4"	2"	Round	Keo	2846A38	00000	3210A253	00000
						5/8"	3/8"	2 1/4"	Round	Keo	2846A62	00000	3210A263	00000
						3/4"	1/2"	2 5/8"	Round	Keo	2846A39	00000	3210A273	00000
						1"	1/2"	2 3/4"	Round	Keo	2846A41	00000	3210A283	00000
						1 1/4"	1/2"	2 3/4"	Round	Keo	2846A63	00000	3210A293	000000
						1 1/2"	3/4"	2 7/8"	Round	Keo	2846A64	000000	3210A313	000000
						1 3/4"	3/4"	3"	Round	Keo	2846A65	000000	3210A323	000000


						2"	3/4"	3 1/4"	Round	Keo	2846A66	000000	3210A333	000000

Cobalt Steel

1 Flute

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.

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

Carbide

1 Flute

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.

Titanium Carbon Nitride (TiCN) Coated—The hard, smooth finish prevents chipping and wear and reduces friction to keep material from building up.

Titanium Aluminum Nitride (TiAlN) Coated—Harder than TiCN, these countersinks cut without chipping in iron, titanium, and other metals as hard as Rockwell C50.

Aluminum Titanium Nitride (AlTiN) Coated—Our hardest and most wear-resistant countersinks, these cut through metals as hard as Rockwell C70 without losing their sharp cutting edges.

	Dia.					Uncoated		Titanium Carbon Nitride (TiCN) Coated		Titanium Aluminum Nitride (TiAlN) Coated		Aluminum Titanium Nitride (AlTiN) Coated
	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each		Each		Each		Each
1 Flute







				82° Countersink Angle

				1/8"	1/8"	1 1/2"	Round	Ultra Tool	2922A17	000000	2944A112	000000	2944A115	000000	2944A212	000000


				3/16"	3/16"	2"	Round	Ultra Tool	2922A27	00000	2944A122	00000	2944A125	00000	2944A216	00000
				1/4"	1/4"	2"	Round	Ultra Tool	2922A1	00000	2944A132	00000	2944A135	00000	2944A22	00000
				5/16"	1/4"	2 5/8"	Round	Ultra Tool	2922A35	00000	2944A825	00000	2944A829	00000	2944A834	00000
				3/8"	1/4"	2 5/8"	Round	Ultra Tool	2922A18	00000	2944A142	00000	2944A145	00000	2944A224	00000
				1/2"	1/4"	2 5/8"	Round	Ultra Tool	2922A2	00000	2944A152	00000	2944A155	00000	2944A228	00000
				5/8"	3/8"	2 3/4"	Round	Ultra Tool	2922A19	00000	2944A162	00000	2944A165	00000	2944A232	00000
				3/4"	3/8"	2 3/4"	Round	Ultra Tool	2922A3	000000	2944A172	000000	2944A175	000000	2944A236	000000
				1"	1/2"	3"	Round	Ultra Tool	2922A4	000000	2944A182	000000	2944A185	000000	2944A24	000000
				1 1/4"	3/4"	3 1/4"	Round	Ultra Tool	2922A31	000000	2944A192	000000	2944A195	000000	2944A244	000000




						90° Countersink Angle

						1/8"	1/8"	1 1/2"	Round	Ultra Tool	2922A21	00000	2944A113	00000	2944A116	00000	2944A213	00000


						3/16"	3/16"	2"	Round	Ultra Tool	2922A29	00000	2944A123	00000	2944A126	00000	2944A217	00000
						1/4"	1/4"	2"	Round	Ultra Tool	2922A9	00000	2944A133	00000	2944A136	00000	2944A221	00000
						5/16"	1/4"	2 5/8"	Round	Ultra Tool	2922A36	00000	2944A826	00000	2944A831	00000	2944A835	00000
						3/8"	1/4"	2 5/8"	Round	Ultra Tool	2922A22	00000	2944A143	00000	2944A146	00000	2944A225	00000
						1/2"	1/4"	2 5/8"	Round	Ultra Tool	2922A11	00000	2944A153	00000	2944A156	00000	2944A229	00000
						5/8"	3/8"	2 3/4"	Round	Ultra Tool	2922A23	00000	2944A163	00000	2944A166	00000	2944A233	00000
						3/4"	3/8"	2 3/4"	Round	Ultra Tool	2922A12	000000	2944A173	000000	2944A176	000000	2944A237	000000
						1"	1/2"	3"	Round	Ultra Tool	2922A13	000000	2944A183	000000	2944A186	000000	2944A241	000000
						1 1/4"	3/4"	3 1/4"	Round	Ultra Tool	2922A33	000000	2944A193	000000	2944A196	000000	2944A245	000000

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

1 Flute

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.

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







				100° Countersink Angle

				1/8"	1/8"	1 1/4"	Round	Keo	2846A69	000000	3210A214	000000


				3/16"	3/16"	1 3/8"	Round	Keo	2846A74	00000	3210A224	00000
				1/4"	1/4"	1 1/2"	Round	Keo	2846A75	00000	3210A234	00000
				3/8"	1/4"	1 3/4"	Round	Keo	2846A76	00000	3210A244	00000
				1/2"	1/4"	2"	Round	Keo	2846A77	00000	3210A254	00000
				5/8"	3/8"	2 1/4"	Round	Keo	2846A78	00000	3210A264	00000
				3/4"	1/2"	2 5/8"	Round	Keo	2846A79	00000	3210A274	00000
				1"	1/2"	2 3/4"	Round	Keo	2846A81	00000	3210A284	00000
				1 1/4"	1/2"	2 3/4"	Round	Keo	2846A82	00000	3210A294	000000
				1 1/2"	3/4"	2 7/8"	Round	Keo	2846A83	000000	3210A314	000000
				1 3/4"	3/4"	3"	Round	Keo	2846A84	000000	3210A324	000000


				2"	3/4"	3 1/4"	Round	Keo	2846A85	000000	3210A334	000000




						120° Countersink Angle

						1/8"	1/8"	1 1/4"	Round	Keo	2846A101	00000	3210A215	00000


						3/16"	3/16"	1 3/8"	Round	Keo	2846A102	00000	3210A225	00000
						1/4"	1/4"	1 1/2"	Round	Keo	2846A103	00000	3210A235	00000
						3/8"	1/4"	1 3/4"	Round	Keo	2846A104	00000	3210A245	00000
						1/2"	1/4"	2"	Round	Keo	2846A105	00000	3210A255	00000
						5/8"	3/8"	2 1/4"	Round	Keo	2846A106	00000	3210A265	00000
						3/4"	1/2"	2 5/8"	Round	Keo	2846A107	00000	3210A275	00000
						1"	1/2"	2 3/4"	Round	Keo	2846A108	00000	3210A285	00000
						1 1/4"	1/2"	2 3/4"	Round	Keo	2846A109	00000	3210A295	000000
						1 1/2"	3/4"	2 7/8"	Round	Keo	2846A112	000000	3210A315	000000
						1 3/4"	3/4"	3"	Round	Keo	2846A113	000000	3210A325	000000


						2"	3/4"	3 1/4"	Round	Keo	2846A114	000000	3210A335	000000

Cobalt Steel

1 Flute

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

	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

Carbide

1 Flute

Titanium Carbon Nitride (TiCN) Coated—The hard, smooth finish prevents chipping and wear and reduces friction to keep material from building up.

Titanium Aluminum Nitride (TiAlN) Coated—Harder than TiCN, these countersinks cut without chipping in iron, titanium, and other metals as hard as Rockwell C50.

Aluminum Titanium Nitride (AlTiN) Coated—Our hardest and most wear-resistant countersinks, these cut through metals as hard as Rockwell C70 without losing their sharp cutting edges.

	Dia.					Uncoated		Titanium Carbon Nitride (TiCN) Coated		Titanium Aluminum Nitride (TiAlN) Coated		Aluminum Titanium Nitride (AlTiN) Coated
	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each		Each		Each		Each
1 Flute







				100° Countersink Angle

				1/8"	1/8"	1 1/2"	Round	Ultra Tool	2922A431	000000	2944A117	000000	2944A118	000000	2944A214	000000


				3/16"	3/16"	2"	Round	Ultra Tool	2922A432	00000	2944A127	00000	2944A128	00000	2944A218	00000
				1/4"	1/4"	2"	Round	Ultra Tool	2922A433	00000	2944A137	00000	2944A138	00000	2944A222	00000
				5/16"	1/4"	2 5/8"	Round	Ultra Tool	2922A37	00000	2944A827	00000	2944A832	00000	2944A836	00000
				3/8"	1/4"	2 5/8"	Round	Ultra Tool	2922A434	00000	2944A147	00000	2944A148	00000	2944A226	00000
				1/2"	1/4"	2 5/8"	Round	Ultra Tool	2922A435	00000	2944A157	00000	2944A158	00000	2944A23	00000
				5/8"	3/8"	2 3/4"	Round	Ultra Tool	2922A436	00000	2944A167	00000	2944A168	00000	2944A234	00000
				3/4"	3/8"	2 3/4"	Round	Ultra Tool	2922A437	000000	2944A177	000000	2944A178	000000	2944A238	000000
				1"	1/2"	3"	Round	Ultra Tool	2922A438	000000	2944A187	000000	2944A188	000000	2944A242	000000
				1 1/4"	3/4"	3 1/4"	Round	Ultra Tool	2922A439	000000	2944A197	000000	2944A198	000000	2944A246	000000

Countersink Sets for Screws

Cut cone-shaped recesses for screws of various diameters so the screw head sit flush with the surface. Choose an 82° countersink angle for inch screws or a 90° countersink angle for metric screws.

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

Carbide—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.

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

Titanium Carbon Nitride (TiCN) Coated—The hard, smooth finish prevents chipping and wear and reduces friction to keep material from building up.

Titanium Aluminum Nitride (TiAlN) Coated—Harder than TiCN, these countersinks cut without chipping in iron, titanium, and other metals as hard as Rockwell C50.

Aluminum Titanium Nitride (AlTiN) Coated—Our hardest and most wear-resistant countersinks, these cut through metals as hard as Rockwell C70 without losing their sharp cutting edges.

								82° Countersink Angle		90° Countersink Angle
	No. of Flutes	Body Dia. Included	No. of Pieces	Finish	Shank Type	Container Type	Mfr.		Each		Each
High-Speed Steel



		1	1/4", 1/2", 3/4", 1"	4	Titanium Nitride (TiN) Coated	Round	Plastic Case	M. A. Ford	3210A811	0000000	3210A812	0000000


		1	1/4", 3/8", 1/2", 3/4", 1"	5	Uncoated	Round	Plastic Case	Keo	2846A71	000000	2846A73	000000


		Carbide



				1	1/4", 3/8", 1/2", 5/8", 3/4"	5	Uncoated	Round	Metal Case	Ultra Tool	2922A24	000000	2922A26	000000


				1	1/4", 3/8", 1/2", 5/8", 3/4"	5	Titanium Carbon Nitride (TiCN) Coated	Round	Metal Case	Ultra Tool	2944A712	000000	2944A713	000000
				1	1/4", 3/8", 1/2", 5/8", 3/4"	5	Titanium Aluminum Nitride (TiAlN) Coated	Round	Metal Case	Ultra Tool	2944A715	000000	2944A716	000000
				1	1/4", 3/8", 1/2", 5/8", 3/4"	5	Aluminum Titanium Nitride (AlTiN) Coated	Round	Metal Case	Ultra Tool	2944A742	000000	2944A743	000000

Countersink Hand Tools

This versatile hand tool countersinks, chamfers, and deburrs in a single pass. If the hole is partially obstructed, the angled shank gives you access from the side. The tool comes in a plastic case with five countersinks to create cone-shaped openings for screw heads of different diameters.

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

								90° Countersink Angle
	No. of Flutes	Body Dia. Included	No. of Pieces	Finish	Includes	Shank Type	Container Type		Each
High-Speed Steel



		1	1/8", 1/4", 5/16", 3/8"	5	Uncoated	5" Lg. Plastic Handle	Round	Plastic Case	28775A61	000000

Replacements for Countersinks

		Each
5" Long Plastic Handle	28775A67	00000
1/8" Countersink	28775A62	0000
1/4" Countersink	28775A63	00000
5/16" Countersink	28775A64	00000
3/8" Countersink	28775A65	00000

Carbide-Insert Countersinks for Screws

Your best bet for countersinking dozens or even hundreds of holes economically. When the blade begins to wear, rotate the insert to expose a fresh cutting edge. Once all the edges are worn, pop on a new insert instead of sharpening or throwing away your countersink.

Carbide

With Square

Insert

	Countersinks												Replacement Screws
						Insert				Uncoated
	Shank Dia.	For Hole Dia.	For Min. Hole Dia.	Overall Lg.	Shank Type	Shape	Code	Size	Thk.	Mfr.		Each		Each
1 Flute







				82° Countersink Angle

				1/2"	1/4" to 3/4"	1/4"	2 3/8"	Round	Triangle	TPGH-321	3/8"	1/8"	Republic Drill	29245A61	0000000	29245A96	00000


				1/2"	1/2" to 1 3/4"	1/2"	2 3/8"	Round	Square	SPGH-433	1/2"	3/16"	Republic Drill	29245A62	000000	29245A96	0000
				3/4"	1 1/4" to 2 1/2"	1 1/4"	2 3/8"	Round	Square	SPGH-433	1/2"	3/16"	Republic Drill	29245A63	000000	29245A96	0000




						90° Countersink Angle

						1/2"	1/4" to 3/4"	1/4"	2 3/8"	Round	Triangle	TPGH-321	3/8"	1/8"	Republic Drill	29245A64	000000	29245A96	0000


						1/2"	1/2" to 1 3/4"	1/2"	2 3/8"	Round	Square	SPGH-433	1/2"	3/16"	Republic Drill	29245A65	000000	29245A96	0000
						3/4"	1 1/4" to 2 1/2"	1 1/4"	2 3/8"	Round	Square	SPGH-433	1/2"	3/16"	Republic Drill	29245A66	000000	29245A96	0000

Replacement Carbide Inserts

Individual Carbide

Insert Case

Inserts sold individually come packed in a clear plastic case to protect cutting edges during shipment. Inserts sold in packs come factory sealed from the manufacturer for maximum traceability.

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

		Each		Package
Material	Insert Shape		Each	Pkg. Qty.		Pkg.
Uncoated Carbide	Triangle	29245A67	00000	10	29245A188	000000
Uncoated Carbide	Square	29245A68	00000	10	29245A291	000000
Titanium Nitride (TiN)-Coated Carbide	Triangle	29245A71	00000	10	29245A306	00000
Titanium Nitride (TiN)-Coated Carbide	Square	29245A72	00000	10	29245A918	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

1 Flute

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.

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







				60° Countersink Angle

				1/8"	1/8"	1 1/4"	Round	Keo	2846A11	000000	3210A211	000000


				3/16"	3/16"	1 3/8"	Round	Keo	2846A19	00000	3210A221	00000
				1/4"	1/4"	1 1/2"	Round	Keo	2846A21	00000	3210A231	00000
				3/8"	1/4"	1 3/4"	Round	Keo	2846A22	00000	3210A241	00000
				1/2"	1/4"	2"	Round	Keo	2846A23	00000	3210A251	00000
				5/8"	3/8"	2 1/4"	Round	Keo	2846A12	00000	3210A261	00000
				3/4"	1/2"	2 5/8"	Round	Keo	2846A24	00000	3210A271	00000
				1"	1/2"	2 3/4"	Round	Keo	2846A25	00000	3210A281	00000
				1 1/4"	1/2"	2 3/4"	Round	Keo	2846A13	00000	3210A291	000000
				1 1/2"	3/4"	2 7/8"	Round	Keo	2846A14	000000	3210A311	000000
				1 3/4"	3/4"	3"	Round	Keo	2846A15	000000	3210A321	000000


				2"	3/4"	3 1/4"	Round	Keo	2846A16	000000	3210A331	000000

Cobalt Steel

1 Flute

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

	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

Carbide

1 Flute

Titanium Carbon Nitride (TiCN) Coated—The hard, smooth finish prevents chipping and wear and reduces friction to keep material from building up.

Titanium Aluminum Nitride (TiAlN) Coated—Harder than TiCN, these countersinks cut without chipping in iron, titanium, and other metals as hard as Rockwell C50.

Aluminum Titanium Nitride (AlTiN) Coated—Our hardest and most wear-resistant countersinks, these cut through metals as hard as Rockwell C70 without losing their sharp cutting edges.

	Dia.					Uncoated		Titanium Carbon Nitride (TiCN) Coated		Titanium Aluminum Nitride (TiAlN) Coated		Aluminum Titanium Nitride (AlTiN) Coated
	Body	Shank	Overall Lg.	Shank Type	Mfr.		Each		Each		Each		Each
1 Flute







				60° Countersink Angle

				1/8"	1/8"	1 1/2"	Round	Ultra Tool	2922A14	000000	2944A111	000000	2944A114	000000	2944A211	000000


				3/16"	3/16"	2"	Round	Ultra Tool	2922A28	00000	2944A121	00000	2944A124	00000	2944A215	00000
				1/4"	1/4"	2"	Round	Ultra Tool	2922A5	00000	2944A131	00000	2944A134	00000	2944A219	00000
				5/16"	1/4"	2 5/8"	Round	Ultra Tool	2922A34	00000	2944A824	00000	2944A828	00000	2944A833	00000
				3/8"	1/4"	2 5/8"	Round	Ultra Tool	2922A15	00000	2944A141	00000	2944A144	00000	2944A223	00000
				1/2"	1/4"	2 5/8"	Round	Ultra Tool	2922A6	00000	2944A151	00000	2944A154	00000	2944A227	00000
				5/8"	3/8"	2 3/4"	Round	Ultra Tool	2922A16	00000	2944A161	00000	2944A164	00000	2944A231	00000
				3/4"	3/8"	2 3/4"	Round	Ultra Tool	2922A7	000000	2944A171	000000	2944A174	000000	2944A235	000000
				1"	1/2"	3"	Round	Ultra Tool	2922A8	000000	2944A181	000000	2944A184	000000	2944A239	000000
				1 1/4"	3/4"	3 1/4"	Round	Ultra Tool	2922A32	000000	2944A191	000000	2944A194	000000	2944A243	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

1 Flute

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

	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

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

1 Flute

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

	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

Carbide-Insert Countersinks for Rivets

Carbide

With Square

Insert

	Countersinks												Replacement Screws
						Insert				Uncoated
	Shank Dia.	For Hole Dia.	For Min. Hole Dia.	Overall Lg.	Shank Type	Shape	Code	Size	Thk.	Mfr.		Each		Each
1 Flute







				100° Countersink Angle

				1/2"	1/4" to 3/4"	1/4"	2 3/8"	Round	Triangle	TPGH-321	3/8"	1/8"	Republic Drill	29245A81	0000000	29245A96	00000


				1/2"	1/2" to 1 3/4"	1/2"	2 3/8"	Round	Square	SPGH-433	1/2"	3/16"	Republic Drill	29245A82	000000	29245A96	0000
				3/4"	1 1/4" to 2 1/2"	1 1/4"	2 3/8"	Round	Square	SPGH-433	1/2"	3/16"	Republic Drill	29245A83	000000	29245A96	0000

Replacement Carbide Inserts

Individual Carbide

Insert Case

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

		Each		Package
Material	Insert Shape		Each	Pkg. Qty.		Pkg.
Uncoated Carbide	Triangle	29245A67	00000	10	29245A188	000000
Uncoated Carbide	Square	29245A68	00000	10	29245A291	000000
Titanium Nitride (TiN)-Coated Carbide	Triangle	29245A71	00000	10	29245A306	00000
Titanium Nitride (TiN)-Coated Carbide	Square	29245A72	00000	10	29245A918	000000

Carbide-Insert Countersinks for Lathe Centers

Carbide

With Square

Insert

	Countersinks												Replacement Screws
						Insert				Uncoated
	Shank Dia.	For Hole Dia.	For Min. Hole Dia.	Overall Lg.	Shank Type	Shape	Code	Size	Thk.	Mfr.		Each		Each
1 Flute







				60° Countersink Angle

				1/2"	1/4" to 3/4"	1/4"	2 3/8"	Round	Triangle	TPGH-321	3/8"	1/8"	Republic Drill	29245A57	0000000	29245A96	00000


				1/2"	1/2" to 1 3/4"	1/2"	2 3/4"	Round	Square	SPGH-433	1/2"	3/16"	Republic Drill	29245A58	000000	29245A96	0000
				3/4"	1 1/4" to 2 1/2"	1 1/4"	2 3/4"	Round	Square	SPGH-433	1/2"	3/16"	Republic Drill	29245A59	000000	29245A96	0000

Replacement Carbide Inserts

Individual Carbide

Insert Case

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

		Each		Package
Material	Insert Shape		Each	Pkg. Qty.		Pkg.
Uncoated Carbide	Triangle	29245A67	00000	10	29245A188	000000
Uncoated Carbide	Square	29245A68	00000	10	29245A291	000000
Titanium Nitride (TiN)-Coated Carbide	Triangle	29245A71	00000	10	29245A306	00000
Titanium Nitride (TiN)-Coated Carbide	Square	29245A72	00000	10	29245A918	000000

Countersink Sets for Rivets

Cut cone-shaped recesses for rivets of various diameters so the head sits flush with the surface.

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

Titanium Carbon Nitride (TiCN) Coated—The hard, smooth finish prevents chipping and wear and reduces friction to keep material from building up.

Titanium Aluminum Nitride (TiAlN) Coated—Harder than TiCN, these countersinks cut without chipping in iron, titanium, and other metals as hard as Rockwell C50.

Aluminum Titanium Nitride (AlTiN) Coated—Our hardest and most wear-resistant countersinks, these cut through metals as hard as Rockwell C70 without losing their sharp cutting edges.

							100° Countersink Angle
	No. of Flutes	Body Dia. Included	No. of Pieces	Finish	Shank Type	Container Type	Mfr.		Each
High-Speed Steel



		1	1/4", 3/8", 1/2", 3/4", 1"	5	Uncoated	Round	Plastic Case	Keo	2846A116	0000000


		Carbide



				1	1/4", 3/8", 1/2", 5/8", 3/4"	5	Uncoated	Round	Metal Case	Ultra Tool	2922A441	000000


				1	1/4", 3/8", 1/2", 5/8", 3/4"	5	Titanium Carbon Nitride (TiCN) Coated	Round	Metal Case	Ultra Tool	2944A718	000000
				1	1/4", 3/8", 1/2", 5/8", 3/4"	5	Titanium Aluminum Nitride (TiAlN) Coated	Round	Metal Case	Ultra Tool	2944A717	000000
				1	1/4", 3/8", 1/2", 5/8", 3/4"	5	Aluminum Titanium Nitride (AlTiN) Coated	Round	Metal Case	Ultra Tool	2944A744	000000

Countersink Sets for Lathe Centers

Cut holes for a range of lathe-center diameters. The 60° angle creates a precise recess for both rotating and stationary lathe centers, keeping your workpiece aligned as it spins.

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

Titanium Carbon Nitride (TiCN) Coated—The hard, smooth finish prevents chipping and wear and reduces friction to keep material from building up.

Titanium Aluminum Nitride (TiAlN) Coated—Harder than TiCN, these countersinks cut without chipping in iron, titanium, and other metals as hard as Rockwell C50.

Aluminum Titanium Nitride (AlTiN) Coated—Our hardest and most wear-resistant countersinks, these cut through metals as hard as Rockwell C70 without losing their sharp cutting edges.

							60° Countersink Angle
	No. of Flutes	Body Dia. Included	No. of Pieces	Finish	Shank Type	Container Type	Mfr.		Each
High-Speed Steel



		1	1/4", 3/8", 1/2", 3/4", 1"	5	Uncoated	Round	Plastic Case	Keo	2846A72	0000000


		Carbide



				1	1/4", 3/8", 1/2", 5/8", 3/4"	5	Uncoated	Round	Metal Case	Ultra Tool	2922A25	000000


				1	1/4", 3/8", 1/2", 5/8", 3/4"	5	Titanium Carbon Nitride (TiCN) Coated	Round	Metal Case	Ultra Tool	2944A711	000000
				1	1/4", 3/8", 1/2", 5/8", 3/4"	5	Titanium Aluminum Nitride (TiAlN) Coated	Round	Metal Case	Ultra Tool	2944A714	000000
				1	1/4", 3/8", 1/2", 5/8", 3/4"	5	Aluminum Titanium Nitride (AlTiN) Coated	Round	Metal Case	Ultra Tool	2944A741	000000