Countersinks For Wood | McMaster-Carr

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165 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	Depth Stops

These wear-resistant countersinks cut faster and last longer than carbon steel countersinks, so they’re often used for high-volume jobs. You can also use them on harder materials, such as steel and stainless steel.

	Countersinks							Depth Stops		Drill Bits
					Uncoated
	Body Dia.	For Drill Bit Size	For Screw Size	Overall Lg.	Mfr.		Each		Each		Each
4 Flutes







				82° Countersink Angle

				1/4"	3/32"	No. 3	3/4"	W. L. Fuller	2910A11	000000	2903A11	00000	8870A16	00000


				5/16"	7/64"	No. 4	3/4"	W. L. Fuller	2910A12	00000	2903A12	0000	8870A17	0000
				3/8"	1/8"	No. 5	7/8"	W. L. Fuller	2910A13	00000	2903A13	0000	8870A18	0000
				3/8"	9/64"	No. 6	7/8"	W. L. Fuller	2910A14	00000	2903A13	0000	8870A19	0000
				3/8"	5/32"	No. 7	7/8"	W. L. Fuller	2910A15	00000	2903A13	0000	8870A21	0000
				3/8"	11/64"	No. 8	7/8"	W. L. Fuller	2910A16	00000	2903A13	0000	8870A22	0000
				3/8"	3/16"	No. 9	7/8"	W. L. Fuller	2910A17	00000	2903A13	0000	8870A23	0000
				3/8"	13/64"	No. 10	7/8"	W. L. Fuller	2910A29	00000	2903A13	0000	8870A24	0000
				3/8"	7/32"	No. 12	7/8"	W. L. Fuller	2910A31	00000	2903A13	0000	8870A25	0000
				7/16"	13/64"	No. 10	7/8"	W. L. Fuller	2910A18	00000	2903A14	0000	8870A24	0000
				1/2"	5/32"	No. 7	7/8"	W. L. Fuller	2910A32	00000	2903A15	0000	8870A21	0000


				1/2"	3/16"	No. 9	7/8"	W. L. Fuller	2910A27	00000	2903A15	0000	8870A23	0000
				1/2"	13/64"	No. 10	7/8"	W. L. Fuller	2910A19	00000	2903A15	0000	8870A24	0000
				1/2"	7/32"	No. 12	7/8"	W. L. Fuller	2910A21	00000	2903A15	0000	8870A25	0000
				1/2"	1/4"	No. 14	7/8"	W. L. Fuller	2910A22	00000	2903A15	0000	8870A27	0000
				5/8"	3/16"	No. 9	1 1/16"	W. L. Fuller	2910A23	00000	2903A17	0000	8870A23	0000
				5/8"	1/4"	No. 16	1 1/16"	W. L. Fuller	2910A24	00000	2903A17	0000	8870A27	0000
				5/8"	9/32"	No. 16	1 1/16"	W. L. Fuller	2910A25	00000	2903A17	0000	8870A29	0000
				5/8"	5/16"	No. 18	1 1/16"	W. L. Fuller	2910A26	00000	2903A17	0000	8870A32	0000




						90° Countersink Angle

						1/4"	3/32"	No. 3	3/4"	W. L. Fuller	2910A71	00000	2903A11	0000	8870A16	0000


						5/16"	7/64"	No. 4	3/4"	W. L. Fuller	2910A72	00000	2903A12	0000	8870A17	0000
						3/8"	1/8"	No. 5	7/8"	W. L. Fuller	2910A73	00000	2903A13	0000	8870A18	0000
						3/8"	9/64"	No. 6	7/8"	W. L. Fuller	2910A74	00000	2903A13	0000	8870A19	0000
						3/8"	5/32"	No. 7	7/8"	W. L. Fuller	2910A75	00000	2903A13	0000	8870A21	0000
						3/8"	11/64"	No. 8	7/8"	W. L. Fuller	2910A76	00000	2903A13	0000	8870A22	0000
						3/8"	3/16"	No. 9	7/8"	W. L. Fuller	2910A77	00000	2903A13	0000	8870A23	0000
						3/8"	13/64"	No. 10	7/8"	W. L. Fuller	2910A89	00000	2903A13	0000	8870A24	0000
						3/8"	7/32"	No. 12	7/8"	W. L. Fuller	2910A91	00000	2903A13	0000	8870A25	0000
						7/16"	13/64"	No. 10	7/8"	W. L. Fuller	2910A78	00000	2903A14	0000	8870A24	0000
						1/2"	5/32"	No. 7	7/8"	W. L. Fuller	2910A92	00000	2903A15	0000	8870A21	0000


						1/2"	3/16"	No. 9	7/8"	W. L. Fuller	2910A87	00000	2903A15	0000	8870A23	0000
						1/2"	13/64"	No. 10	7/8"	W. L. Fuller	2910A79	00000	2903A15	0000	8870A24	0000
						1/2"	7/32"	No. 12	7/8"	W. L. Fuller	2910A81	00000	2903A15	0000	8870A25	0000
						1/2"	1/4"	No. 14	7/8"	W. L. Fuller	2910A82	00000	2903A15	0000	8870A27	0000
						5/8"	3/16"	No. 9	1 1/16"	W. L. Fuller	2910A83	00000	2903A17	0000	8870A23	0000
						5/8"	1/4"	No. 16	1 1/16"	W. L. Fuller	2910A84	00000	2903A17	0000	8870A27	0000
						5/8"	9/32"	No. 16	1 1/16"	W. L. Fuller	2910A85	00000	2903A17	0000	8870A29	0000
						5/8"	5/16"	No. 18	1 1/16"	W. L. Fuller	2910A86	00000	2903A17	0000	8870A32	0000

Carbon Steel


4 Flutes	Depth Stops

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							Depth Stops		Drill Bits
					Uncoated
	Body Dia.	For Drill Bit Size	For Screw Size	Overall Lg.	Mfr.		Each		Each		Each
4 Flutes







				82° Countersink Angle

				1/4"	3/32"	No. 3	3/4"	W. L. Fuller	2785A12	000000	2903A11	00000	3080A36	00000


				5/16"	7/64"	No. 4	7/8"	W. L. Fuller	2785A13	00000	2903A12	0000	3080A37	0000
				3/8"	1/8"	No. 5	7/8"	W. L. Fuller	2785A21	00000	2903A13	0000	3080A14	0000
				3/8"	9/64"	No. 6	7/8"	W. L. Fuller	2785A22	00000	2903A13	0000	3080A16	0000
				3/8"	5/32"	No. 7	7/8"	W. L. Fuller	2785A23	00000	2903A13	0000	3080A17	0000
				3/8"	11/64"	No. 8	7/8"	W. L. Fuller	2785A24	00000	2903A13	0000	3080A18	0000
				3/8"	3/16"	No. 9	7/8"	W. L. Fuller	2785A25	00000	2903A13	0000	3080A19	0000
				3/8"	13/64"	No. 10	7/8"	W. L. Fuller	2785A26	00000	2903A13	0000	3080A22	0000
				3/8"	7/32"	No. 12	7/8"	W. L. Fuller	2785A27	00000	2903A13	0000	3080A23	00000
				7/16"	13/64"	No. 10	7/8"	W. L. Fuller	2785A31	00000	2903A14	0000	3080A22	0000
				1/2"	5/32"	No. 7	7/8"	W. L. Fuller	2785A35	00000	2903A15	0000	3080A17	0000


				1/2"	3/16"	No. 9	7/8"	W. L. Fuller	2785A37	00000	2903A15	0000	3080A19	0000
				1/2"	13/64"	No. 10	7/8"	W. L. Fuller	2785A38	00000	2903A15	0000	3080A22	0000
				1/2"	7/32"	No. 12	7/8"	W. L. Fuller	2785A39	00000	2903A15	0000	3080A23	00000
				1/2"	1/4"	No. 14	7/8"	W. L. Fuller	2785A52	00000	2903A15	0000	3080A25	00000
				5/8"	3/16"	No. 9	1 1/16"	W. L. Fuller	2785A53	00000	2903A17	0000	3080A19	0000
				5/8"	1/4"	No. 16	1 1/16"	W. L. Fuller	2785A54	00000	2903A17	0000	3080A25	00000
				5/8"	9/32"	No. 16	1 1/16"	W. L. Fuller	2785A56	00000	2903A17	0000	3080A32	00000
				5/8"	5/16"	No. 18	1 1/16"	W. L. Fuller	2785A58	00000	2903A17	0000	3080A34	00000

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	Depth Stops

	Countersinks										Depth Stops		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		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	3438N11	000000	8870A16	00000


				1/2"	1"	No. 4	—	2 9/16"	1/4"	Quick-Change Hex	Make It Snappy Tools	2747A21	0000	3438N11	00000	8870A15	0000
				1/2"	1"	No. 6	No. 8	2 27/32"	1/4"	Quick-Change Hex	Make It Snappy Tools	2747A23	0000	3438N11	00000	8870A17	0000
				1/2"	1"	No. 8	No. 10	2 31/32"	1/4"	Quick-Change Hex	Make It Snappy Tools	2747A24	0000	3438N11	00000	8870A18	0000
				1/2"	1"	No. 10	No. 12	3 3/32"	1/4"	Quick-Change Hex	Make It Snappy Tools	2747A25	0000	3438N11	00000	8870A19	0000

Drill-Bit Countersink Sets for Wood and Plastic

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

High-Speed Steel—These wear-resistant countersinks cut faster and last longer than carbon steel countersinks, so they’re often used for high-volume jobs. You can also use them on harder materials, such as steel and stainless 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	For Drill Bit Size (Body Dia.)	No. of Pieces	Finish	Container Type	Mfr.		Each
High-Speed Steel



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


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


		Carbon Steel



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


				4	1/8" (3/8"), 9/64" (3/8"), 5/32" (3/8"), 11/64" (3/8"), 3/16" (3/8"), 13/64" (7/16"), 3/16" (1/2"), 13/64" (1/2"), 7/32" (1/2"), 1/4" (1/2"), 3/16" (5/8"), 1/4" (5/8"), 9/32" (5/8"), 5/16" (5/8")	14	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 and Plastic


Shown with Drill Bit (Sold Separately)

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.

	Overall Length	For Drill Bit Size	No. of Flutes	No. of Pieces	Container Type	Mfr.		Each
Uncoated Steel



	5/8", 3/4", 7/8", 1", 1 1/8"	1", 1 1/8", 1 1/4", 1 3/8", 1 1/2"	3/16", 1/4", 5/16", 3/8", 7/16", 1/2"	4	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	000000	3471N15	000000

Quick-Change Hex Counterbore Drill Bits


	Depth Stops

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.

Depth Stops—Stop your drill bit at the exact depth you need for an identical hole every time. To set the depth, slip these stops over your bit and tighten a set screw to lock them in place. A free-spinning ring on the front stops when it touches your workpiece to prevent scratches and dents. An opening in the side clears chips from the hole as you cut.

	Counterbore Drill Bits										Depth Stops		Replacement Drill Bits
	Body Dia.	Overall Lg.	Shank Size	No. of Flutes	Max. Hole Drilling Dp.	Drill Bit Size	For Use On	Mfr.		Each		Each		Each
Titanium Aluminum Nitride (TiAlN)-Coated High-Speed Steel



		3/8"	2 7/8"	1/4"	2	1.1"	1/8"	Aluminum, Plastic, Wood	Make It Snappy Tools	3438N21	000000	3438N11	000000	2908A35	00000


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

Drill-Bit Counterbores for Wood and Plastic

Shown with Drill Bit (Sold

Separately)

Stainless Steel About Stainless Steel


2 Flutes	Depth Stops

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

Counterbores							Depth Stops		Drill Bits
					Uncoated
Body Dia.	For Drill Bit Size	Overall Lg.	No. of Flutes	Mfr.		Each		Each		Each



	3/8"	1/8"	1"	2	W. L. Fuller	3105A51	000000	2903A13	00000	2926A111	00000


	7/16"	5/32"	1"	2	W. L. Fuller	3105A54	00000	2903A14	0000	2926A112	0000
	1/2"	1/8"	1"	2	W. L. Fuller	3105A52	00000	2903A15	0000	2926A111	0000
	1/2"	3/16"	1"	2	W. L. Fuller	3105A53	00000	2903A15	0000	2926A201	0000
	1/2"	15/64"	1"	2	W. L. Fuller	3105A55	00000	2903A15	0000	2926A202	0000
	9/16"	7/32"	1"	2	W. L. Fuller	3105A56	00000	2903A16	0000	2926A113	0000

Steel


4 Flutes	Depth Stops

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

Counterbores							Depth Stops		Drill Bits
					Uncoated
Body Dia.	For Drill Bit Size	Overall Lg.	No. of Flutes	Mfr.		Each		Each		Each



	5/8"	3/16"	1"	4	W. L. Fuller	3105A11	000000	2903A17	00000	2926A201	00000


	5/8"	1/4"	1"	4	W. L. Fuller	3105A21	00000	2903A17	0000	2926A114	00000
	3/4"	1/4"	1"	4	W. L. Fuller	3105A12	00000	2903A18	0000	2926A114	00000
	3/4"	5/16"	1 1/8"	4	W. L. Fuller	3105A13	00000	2903A18	0000	2926A117	00000
	7/8"	3/8"	1 1/4"	4	W. L. Fuller	3105A14	00000	2903A19	0000	2926A119	00000
	1"	7/16"	1 3/8"	4	W. L. Fuller	3105A15	00000	2903A21	0000	2926A123	00000
	1 1/8"	1/2"	1 1/2"	4	W. L. Fuller	3105A16	00000	2903A32	0000	2926A77	00000
	1 1/4"	9/16"	1 5/8"	4	W. L. Fuller	3105A22	00000	2903A23	0000	2926A79	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 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
Black-Oxide High-Speed Steel Countersink







				4 Countersink Flutes

				No. 10	1/8"	3/8"	2 1/4"	82°	No. 2	Phillips	5/16"	3 3/4"	Aluminum, Fiberglass, Plastic, Wood	3471N13	000000	3471N16	000000

Long-Reach Drill-Bit Countersinks

Shown with Drill Bit

(Sold Separately)

Cut holes in hard-to-reach spots—these countersinks are about twice as long as standard drill-bit countersinks. They attach anywhere along your drill bit, so one tool can drill and countersink holes of different depths. The length of the countersink adds enough rigidity to minimize the wobbling that can happen when using a long drill bit.

Carbon Steel

Depth Stops

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.

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

	Countersinks								Depth Stops		Drill Bits
	Dia.					Black Oxide
	Body	Shank	For Drill Bit Size	For Screw Size	Overall Lg.	Mfr.		Each		Each		Each
4 Flutes







				82° Countersink Angle

				3/8"	1/2"	1/8"	No. 5	3"	W. L. Fuller	11182N11	000000	2903A13	00000	30915A74	000000


				3/8"	1/2"	9/64"	No. 6	3"	W. L. Fuller	11182N12	00000	2903A13	0000	30915A75	00000
				3/8"	1/2"	11/64"	No. 8	3"	W. L. Fuller	11182N13	00000	2903A13	0000	30915A77	00000
				3/8"	1/2"	13/64"	No. 10	3"	W. L. Fuller	11182N14	00000	2903A13	0000	30915A79	00000
				1/2"	1/2"	1/4"	No. 14	3"	W. L. Fuller	11182N15	00000	2903A17	0000	30915A83	00000