Countersinks For Wood | McMaster-Carr

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118 Products

About Countersinks

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

Drill-Bit Countersinks for Wood and Plastic

These countersinks attach at various points along the drill bit, so one tool will drill countersunk holes for screws of different lengths. They're designed to cut a smooth and even finish in wood and plastic on the first pass.

High-Speed Steel

4 Flutes

The choice if you're countersinking lots of holes, these wear-resistant countersinks cut faster and last longer than carbon 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.

	Countersinks							Counterbore Collars
					Uncoated
	Body Dia.	For Drill Bit Size	For Screw Size	Overall Lg.	Mfr.		Each	OD	Wd.		Each
4 Flutes







				82° Countersink Angle

				1/4"	3/32"	No. 3	3/4"	W. L. Fuller	2910A11	000000	1/2"	1/4"	2903A11	00000


				5/16"	7/64"	No. 4	3/4"	W. L. Fuller	2910A12	00000	9/16"	1/4"	2903A12	0000
				3/8"	1/8"	No. 5	7/8"	W. L. Fuller	2910A13	00000	5/8"	1/4"	2903A13	0000
				3/8"	9/64"	No. 6	7/8"	W. L. Fuller	2910A14	00000	5/8"	1/4"	2903A13	0000
				3/8"	5/32"	No. 7	7/8"	W. L. Fuller	2910A15	00000	5/8"	1/4"	2903A13	0000
				3/8"	11/64"	No. 8	7/8"	W. L. Fuller	2910A16	00000	5/8"	1/4"	2903A13	0000
				3/8"	3/16"	No. 9	7/8"	W. L. Fuller	2910A17	00000	5/8"	1/4"	2903A13	0000
				3/8"	13/64"	No. 10	7/8"	W. L. Fuller	2910A29	00000	5/8"	1/4"	2903A13	0000
				3/8"	7/32"	No. 12	7/8"	W. L. Fuller	2910A31	00000	5/8"	1/4"	2903A13	0000
				7/16"	13/64"	No. 10	7/8"	W. L. Fuller	2910A18	00000	11/16"	1/4"	2903A14	0000
				1/2"	5/32"	No. 7	7/8"	W. L. Fuller	2910A32	00000	3/4"	1/4"	2903A15	0000


				1/2"	3/16"	No. 9	7/8"	W. L. Fuller	2910A27	00000	3/4"	1/4"	2903A15	0000
				1/2"	13/64"	No. 10	7/8"	W. L. Fuller	2910A19	00000	3/4"	1/4"	2903A15	0000
				1/2"	7/32"	No. 12	7/8"	W. L. Fuller	2910A21	00000	3/4"	1/4"	2903A15	0000
				1/2"	1/4"	No. 14	7/8"	W. L. Fuller	2910A22	00000	3/4"	1/4"	2903A15	0000
				5/8"	3/16"	No. 9	1 1/16"	W. L. Fuller	2910A23	00000	7/8"	1/4"	2903A17	0000
				5/8"	1/4"	No. 16	1 1/16"	W. L. Fuller	2910A24	00000	7/8"	1/4"	2903A17	0000
				5/8"	9/32"	No. 16	1 1/16"	W. L. Fuller	2910A25	00000	7/8"	1/4"	2903A17	0000
				5/8"	5/16"	No. 18	1 1/16"	W. L. Fuller	2910A26	00000	7/8"	1/4"	2903A17	0000




						90° Countersink Angle

						1/4"	3/32"	No. 3	3/4"	W. L. Fuller	2910A71	00000	1/2"	1/4"	2903A11	0000


						5/16"	7/64"	No. 4	3/4"	W. L. Fuller	2910A72	00000	9/16"	1/4"	2903A12	0000
						3/8"	1/8"	No. 5	7/8"	W. L. Fuller	2910A73	00000	5/8"	1/4"	2903A13	0000
						3/8"	9/64"	No. 6	7/8"	W. L. Fuller	2910A74	00000	5/8"	1/4"	2903A13	0000
						3/8"	5/32"	No. 7	7/8"	W. L. Fuller	2910A75	00000	5/8"	1/4"	2903A13	0000
						3/8"	11/64"	No. 8	7/8"	W. L. Fuller	2910A76	00000	5/8"	1/4"	2903A13	0000
						3/8"	3/16"	No. 9	7/8"	W. L. Fuller	2910A77	00000	5/8"	1/4"	2903A13	0000
						3/8"	13/64"	No. 10	7/8"	W. L. Fuller	2910A89	00000	5/8"	1/4"	2903A13	0000
						3/8"	7/32"	No. 12	7/8"	W. L. Fuller	2910A91	00000	5/8"	1/4"	2903A13	0000
						7/16"	13/64"	No. 10	7/8"	W. L. Fuller	2910A78	00000	11/16"	1/4"	2903A14	0000
						1/2"	5/32"	No. 7	7/8"	W. L. Fuller	2910A92	00000	3/4"	1/4"	2903A15	0000


						1/2"	3/16"	No. 9	7/8"	W. L. Fuller	2910A87	00000	3/4"	1/4"	2903A15	0000
						1/2"	13/64"	No. 10	7/8"	W. L. Fuller	2910A79	00000	3/4"	1/4"	2903A15	0000
						1/2"	7/32"	No. 12	7/8"	W. L. Fuller	2910A81	00000	3/4"	1/4"	2903A15	0000
						1/2"	1/4"	No. 14	7/8"	W. L. Fuller	2910A82	00000	3/4"	1/4"	2903A15	0000
						5/8"	3/16"	No. 9	1 1/16"	W. L. Fuller	2910A83	00000	7/8"	1/4"	2903A17	0000
						5/8"	1/4"	No. 16	1 1/16"	W. L. Fuller	2910A84	00000	7/8"	1/4"	2903A17	0000
						5/8"	9/32"	No. 16	1 1/16"	W. L. Fuller	2910A85	00000	7/8"	1/4"	2903A17	0000
						5/8"	5/16"	No. 18	1 1/16"	W. L. Fuller	2910A86	00000	7/8"	1/4"	2903A17	0000

Carbon Steel

4 Flutes

Stronger than high-speed steel, so it will cut through harder materials. However, high-speed steel is more precise, lasts longer, and cuts at higher speeds.

	Countersinks							Counterbore Collars
					Uncoated
	Body Dia.	For Drill Bit Size	For Screw Size	Overall Lg.	Mfr.		Each	OD	Wd.		Each
4 Flutes







				82° Countersink Angle

				1/4"	3/32"	No. 3	3/4"	W. L. Fuller	2785A12	000000	1/2"	1/4"	2903A11	00000


				5/16"	7/64"	No. 4	7/8"	W. L. Fuller	2785A13	00000	9/16"	1/4"	2903A12	0000
				3/8"	1/8"	No. 5	7/8"	W. L. Fuller	2785A21	0000	5/8"	1/4"	2903A13	0000
				3/8"	9/64"	No. 6	7/8"	W. L. Fuller	2785A22	0000	5/8"	1/4"	2903A13	0000
				3/8"	5/32"	No. 7	7/8"	W. L. Fuller	2785A23	0000	5/8"	1/4"	2903A13	0000
				3/8"	11/64"	No. 8	7/8"	W. L. Fuller	2785A24	0000	5/8"	1/4"	2903A13	0000
				3/8"	3/16"	No. 9	7/8"	W. L. Fuller	2785A25	0000	5/8"	1/4"	2903A13	0000
				3/8"	13/64"	No. 10	7/8"	W. L. Fuller	2785A26	0000	5/8"	1/4"	2903A13	0000
				3/8"	7/32"	No. 12	7/8"	W. L. Fuller	2785A27	0000	5/8"	1/4"	2903A13	0000
				7/16"	13/64"	No. 10	7/8"	W. L. Fuller	2785A31	00000	11/16"	1/4"	2903A14	0000
				1/2"	5/32"	No. 7	7/8"	W. L. Fuller	2785A35	00000	3/4"	1/4"	2903A15	0000


				1/2"	3/16"	No. 9	7/8"	W. L. Fuller	2785A37	00000	3/4"	1/4"	2903A15	0000
				1/2"	13/64"	No. 10	7/8"	W. L. Fuller	2785A38	00000	3/4"	1/4"	2903A15	0000
				1/2"	7/32"	No. 12	7/8"	W. L. Fuller	2785A39	00000	3/4"	1/4"	2903A15	0000
				1/2"	1/4"	No. 14	7/8"	W. L. Fuller	2785A52	00000	3/4"	1/4"	2903A15	0000
				5/8"	3/16"	No. 9	1 1/16"	W. L. Fuller	2785A53	00000	7/8"	1/4"	2903A17	0000
				5/8"	1/4"	No. 16	1 1/16"	W. L. Fuller	2785A54	00000	7/8"	1/4"	2903A17	0000
				5/8"	9/32"	No. 16	1 1/16"	W. L. Fuller	2785A56	00000	7/8"	1/4"	2903A17	0000
				5/8"	5/16"	No. 18	1 1/16"	W. L. Fuller	2785A58	00000	7/8"	1/4"	2903A17	0000

Quick-Change Hex Drill-Bit Countersinks for Wood and Plastic

Switch bits instead of tools to simplify jobs. These snap directly into drills, power screwdrivers, and other tools that accept a 1/4" hex shank. You can slide the countersink up and down the drill bit and then secure it with a set screw, so one tool will drill countersunk holes for screws of different lengths. These countersinks cut a smooth and even finish in wood and plastic on the first pass.

High-Speed Steel

2 Flutes

The choice if you're countersinking lots of holes, these wear-resistant countersinks cut faster and last longer than carbon steel.

	Countersinks										Replacement Drill Bits
			For Screw Size					Uncoated
	Body Dia.	Max. Hole Drilling Dp.	Hard Wood	Soft Wood	Overall Lg.	Shank Size	Shank Type	Mfr.		Each		Each
2 Flutes







				82° Countersink Angle

				1/2"	1"	—	No. 6	2 11/16"	1/4"	Quick-Change Hex	Make It Snappy Tools	2747A22	00000	8870A16	00000


				1/2"	1"	No. 4	—	2 9/16"	1/4"	Quick-Change Hex	Make It Snappy Tools	2747A21	0000	8870A15	0000
				1/2"	1"	No. 6	No. 8	2 27/32"	1/4"	Quick-Change Hex	Make It Snappy Tools	2747A23	0000	8870A17	0000
				1/2"	1"	No. 8	No. 10	2 31/32"	1/4"	Quick-Change Hex	Make It Snappy Tools	2747A24	0000	8870A18	0000
				1/2"	1"	No. 10	No. 12	3 3/32"	1/4"	Quick-Change Hex	Make It Snappy Tools	2747A25	0000	8870A19	0000

Drill-Bit Countersink Sets for Wood and Plastic

Image of Product. Front orientation. Countersinks. Straight Flute, For Cutting Screw Holes, 1 Countersinking End, For Wood, Drill-Bit Countersink, Sold as Sets.

High-Speed Steel—The choice if you're countersinking lots of holes, these wear-resistant countersinks cut faster and last longer than carbon steel.

Carbon Steel—Stronger than high-speed steel, so it will cut through harder materials. However, high-speed steel is more precise, lasts longer, and cuts at higher speeds.

							82° Countersink Angle
	No. of Flutes	Body Dia. Included	No. of Pieces	For Drill Bit Size	Finish	Container Type	Mfr.		Each
High-Speed Steel



		4	3/8", 7/16", 1/2"	7	1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32"	Uncoated	Wood Stand	W. L. Fuller	2910A41	0000000


		4	3/8", 7/16", 1/2", 5/8"	14	1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 1/4", 9/32", 5/16"	Uncoated	Wood Stand	W. L. Fuller	2910A45	000000


		Carbon Steel



				4	3/8", 7/16", 1/2"	7	1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32"	Uncoated	Wood Stand	W. L. Fuller	2785A46	00000


				4	3/8", 7/16", 1/2", 5/8"	14	1/8", 9/64", 5/32", 11/64", 3/16", 13/64", 7/32", 1/4", 9/32", 5/16"	Uncoated	Wood Stand	W. L. Fuller	2785A48	000000

Fast-Cutting Smooth-Finish Drill-Bit Counterbores for Wood

With thin cutting edges to minimize contact with the hole, these counterbores make smooth, accurate cuts at high speeds. Attach them to any drill bit with a 1/2" shank and a cutting diameter of 1/2" or larger. They move up and down the drill bit and lock into place with set screws to match the length of the screw you're installing.

Carbon Steel About Carbon Steel

					Uncoated
Body Dia.	Overall Lg.	For Shank Dia.	For Min. Drill Bit Cutting Dia.	Mfr.		Each



	1 1/8"	1"	1/2"	1/2"	Stern	2921A12	000000


	1 1/4"	1"	1/2"	1/2"	Stern	2921A13	00000
	1 3/8"	1"	1/2"	1/2"	Stern	2921A14	00000
	1 1/2"	1"	1/2"	1/2"	Stern	2921A15	00000
	1 3/4"	1"	1/2"	1/2"	Stern	2921A17	000000
	2"	1 1/4"	1/2"	1/2"	Stern	2921A19	000000
	2 1/2"	1 1/4"	1/2"	1/2"	Stern	2921A24	000000

Drill-Bit Counterbore Sets for Wood

Drill and counterbore holes of different depths without changing tools. These counterbores move along the drill bit (sold separately) and lock into place with set screws to match the length of the screw you're installing.

	No. of Pieces	Container Type	Mfr.		Each
Uncoated Steel



	3/46", 1/4", 5/16", 3/8", 7/16", 1/2"	6	Wood Stand	W. L. Fuller	3105A31	0000000

Quick-Change Combination Countersinking Drill/Screwdriver Bit Sets

Fasten differently sized screws with these sets. They save you the effort of switching three separate bits in and out of a power tool, instead letting you flip between a countersinking drill and a screwdriver bit with a single hand. You can also attach your own countersinking drills and screwdriver bits as long as they have a _1/4” hex shank.

Countersinking drills have an 82° angle, allowing inch-sized flat- and oval-head screws to sit flush with the surface.

	Drill/Screwdriver Bits									Replacement 3/32" Drill Bits		Replacement 7/64" Drill Bits
	No. of Pieces	Includes	Countersink Angle	Countersink Body Dia.	No. of Countersink Flutes	Adapter Hex Shank Size	For Use On		Each		Each		Each
Black-Oxide High-Speed Steel Countersink



		11	1 Drill-Bit Countersink for 3/32" Drill Bit 1 Drill-Bit Countersink for 7/64" Drill Bit 1 Drill Bit (3/32" Drill Bit Size) 2 Drill Bits (7/64" Drill Bit Size) 1 Phillips No. 1 Screwdriver Bit (1" O'all Lg.) 2 Phillips No. 2 Screwdriver Bits (1" O'all Lg.) 1 Reversible Shaft 1 Adapter 1 Hex L-Key	82°	3/8"	4	5/16"	Aluminum, Fiberglass, Plastic, Wood	3470N11	000000	3471N14	00000	3471N15	00000

Quick-Change Combination Countersinking Drill/Screwdriver Bits

Drill, countersink, and drive screws without switching three separate bits in and out of your power tool. With a single hand, flip between drilling countersunk holes and driving screws. The countersinking drill and screwdriver bit are secured with set screws, so you can switch them out for any bits with a _1/4” hex shank.

The countersinking drill has an 82° angle, allowing inch-sized flat- and oval-head screws to sit flush with the surface.

	Drill/Screwdriver Bits												Replacement 7/64" Drill Bits		Replacement 1/8" Drill Bits
	For Screw Size	Drill Bit Size	Countersink Body Dia.	Max. Hole Drilling Dp.	Countersink Angle	Screwdriver Bit Size	For Drive Style	Adapter Hex Shank Size	Adapter Lg.	For Use On		Each		Each		Each
Black-Oxide High-Speed Steel Countersink







				4 Countersink Flutes

				No. 8	7/64"	3/8"	2"	82°	No. 2	Phillips	5/16"	3 3/4"	Aluminum, Fiberglass, Plastic, Wood	3471N12	000000	3471N15	00000	———	0


				No. 10	1/8"	3/8"	2 1/4"	82°	No. 2	Phillips	5/16"	3 3/4"	Aluminum, Fiberglass, Plastic, Wood	3471N13	00000	———	0	3471N16	00000

Quick-Change Hex Drill-Bit Counterbores for Wood

Shown with Optional Drill

Stop (Sold Separately)

Pop the 1/4" hex shank into a drill chuck, power screwdriver, or impact driver to drill and counterbore a hole in a single step. These counterbores move along the included drill bit and lock into place with set screws to match the length of the screw you're installing.

Steel


	Stops

Stops—Attach with a set screw to stop the counterbore at the exact depth you need. These stops have a ring on the end that rotates separately from the body. When the ring touches your workpiece, it stops spinning to prevent scratches and dents. An opening in the side clears chips from the hole as you cut.

Counterbores										Stops		Replacement Drill Bits
		Shank						Black Oxide
Body Dia.	Overall Lg.	Size	Type	No. of Flutes	Max. Hole Drilling Dp.	Drill Bit Size	Mfr.		Each		Each		Each



	3/8"	2 7/8"	1/4"	Quick-Change Hex	3	1.1"	1/8"	Make It Snappy Tools	3438N21	000000	3438N11	000000	2908A35	00000


	1/2"	2 7/8"	1/4"	Quick-Change Hex	3	1.2"	1/8"	Make It Snappy Tools	3438N22	00000	3438N11	00000	2908A35	0000
	5/8"	3 1/4"	1/4"	Quick-Change Hex	3	1.3"	3/16"	Make It Snappy Tools	3438N23	00000	———	0	2908A39	0000
	5/8"	3 21/32"	1/4"	Quick-Change Hex	3	2.7"	1/4"	Make It Snappy Tools	3438N311	00000	———	0	2908A44	0000
	3/4"	3 1/4"	1/4"	Quick-Change Hex	3	1.3"	3/16"	Make It Snappy Tools	3438N24	00000	———	0	2908A39	0000
	3/4"	3 5/8"	1/4"	Quick-Change Hex	3	1.6"	1/4"	Make It Snappy Tools	3438N25	00000	———	0	2908A44	0000
	3/4"	3 31/32"	1/4"	Quick-Change Hex	3	3"	5/16"	Make It Snappy Tools	3438N312	00000	———	0	2908A48	00000
	1"	4 11/16"	1/4"	Quick-Change Hex	3	3.7"	7/16"	Make It Snappy Tools	3438N313	00000	———	0	2908A57	00000

Drill-Bit Counterbores for Wood

Shown with Drill Bit (Sold

Separately)

Steel


	Counterbore Collars

Counterbore Collars—Attach with a set screw to stop the counterbore at the exact depth you need.

Counterbores							Counterbore Collars
					Uncoated
Body Dia.	Overall Lg.	No. of Flutes	For Drill Bit Size	Mfr.		Each	OD	Wd.		Each



	5/8"	1"	4	3/16"	W. L. Fuller	3105A11	000000	7/8"	1/4"	2903A17	00000


	5/8"	1"	4	1/4"	W. L. Fuller	3105A21	00000	7/8"	1/4"	2903A17	0000
	3/4"	1"	4	1/4"	W. L. Fuller	3105A12	00000	1"	1/4"	2903A18	0000
	3/4"	1 1/8"	4	5/16"	W. L. Fuller	3105A13	00000	1"	1/4"	2903A18	0000
	7/8"	1 1/4"	4	3/8"	W. L. Fuller	3105A14	00000	1 1/8"	1/4"	2903A19	0000
	1"	1 3/8"	4	7/16"	W. L. Fuller	3105A15	00000	1 1/4"	5/16"	2903A21	0000
	1 1/8"	1 1/2"	4	1/2"	W. L. Fuller	3105A16	00000	1 3/8"	5/16"	2903A32	0000
	1 1/4"	1 5/8"	4	9/16"	W. L. Fuller	3105A22	00000	1 1/2"	3/8"	2903A23	0000