8-Point Bits | McMaster-Carr

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96 Products

Double Square Bits

Twice as many contact points as square bits to deliver more torque. These bits are also easier to align, and are less likely to slip and strip the drive. They're frequently used to turn fasteners on enclosed trailers and campers.

Hex Shank—Also known as insert bits, these snap into hand tools. If you want to use them with power tools, attach a bit adapter (not included).

Steel—Best for dry environments, since moisture will cause these bits to rust.

		Each
For Hand Tools







	1/4" Hex Shank Size

	No. 1	1"	Steel	2718N11	00000


	No. 2	1"	Steel	2718N12	0000
	No. 3	1"	Steel	2718N13	0000

8-Point Sockets

Quickly position these sockets on square and external 8-point fasteners.

Chrome-Plated Steel

1/4",

3/8", and

1/2"

Square

Drive Size

8-Point

Socket

					Standard Clearance
	Drive Size	OD	Socket Shape	For Drive Style	Overall Lg.		Each
1/4" Square Drive



		1/4"	15/32"	8-Point	External Square	7/8"	5543A62	00000


		5/16"	9/16"	8-Point	External Square	7/8"	5543A63	0000
		3/8"	21/32"	8-Point	External Square	7/8"	5543A65	0000


		3/8" Square Drive



				1/4"	5/8"	8-Point	External Square	1 1/8"	5544A52	0000


				5/16"	5/8"	8-Point	External Square	1 1/8"	5544A53	0000
				3/8"	5/8"	8-Point	External Square	1 1/8"	5544A58	0000
				7/16"	3/4"	8-Point	External Square	1 1/8"	5544A54	0000
				1/2"	13/16"	8-Point	External Square	1 1/8"	5544A55	0000
				9/16"	15/16"	8-Point	External Square	1 1/8"	5544A56	0000
				5/8"	1 1/16"	8-Point	External Square	1 1/8"	5544A57	00000
				11/16"	1 9/64"	8-Point	External Square	1 1/8"	5544A113	00000
				3/4"	1 13/64"	8-Point	External Square	1 1/8"	5544A114	00000
				13/16"	1 19/64"	8-Point	External Square	1 1/4"	5544A115	00000
				7/8"	1 3/8"	8-Point	External Square	1 5/16"	5544A116	00000


				1/2" Square Drive



						3/8"	7/8"	8-Point	External Square	1 1/2"	5545A293	0000


						7/16"	7/8"	8-Point	External Square	1 1/2"	5545A31	0000
						1/2"	29/32"	8-Point	External Square	1 1/2"	5545A32	0000
						9/16"	31/32"	8-Point	External Square	1 1/2"	5545A45	0000
						5/8"	1 1/16"	8-Point	External Square	1 1/2"	5545A46	0000
						11/16"	1 3/16"	8-Point	External Square	1 1/2"	5545A68	00000
						3/4"	1 9/32"	8-Point	External Square	1 1/2"	5545A69	00000
						13/16"	1 7/16"	8-Point	External Square	1 5/8"	5545A83	00000
						7/8"	1 1/2"	8-Point	External Square	1 3/4"	5545A84	00000
						15/16"	1 5/8"	8-Point	External Square	1 13/16"	5545A95	00000
						1"	1 11/16"	8-Point	External Square	1 15/16"	5545A96	00000


						1 1/16"	1 3/4"	8-Point	External Square	1 15/16"	5545A97	00000
						1 1/8"	1 13/16"	8-Point	External Square	2"	5545A98	00000
						1 1/4"	2"	8-Point	External Square	2"	5545A99	00000

Steel

3/4" Square Drive

8-Point

Socket

For

External

Octagonal

Drives

3/4" Square Drive—_3/4" square drive size sockets work with wheel bearing locknuts on trucks and trailers.

					Standard Clearance
	Drive Size	OD	Socket Shape	For Drive Style	Overall Lg.		Each
3/4" Square Drive



		2 3/8"	2 45/64"	8-Point	External Octagon	3 1/2"	99940A110	000000


		2 9/16"	2 59/64"	8-Point	External Octagon	3 1/2"	99940A120	00000
		2 3/4"	3 13/64"	8-Point	External Octagon	3 1/2"	99940A130	00000
		2 7/8"	3 9/32"	8-Point	External Octagon	3 1/2"	99940A140	00000
		3"	3 31/64"	8-Point	External Octagon	3 1/2"	99940A150	00000
		3 1/8"	3 39/64"	8-Point	External Octagon	3 1/2"	99940A160	00000
		3 1/4"	3 45/64"	8-Point	External Octagon	3 1/2"	99940A170	00000
		3 1/2"	3 63/64"	8-Point	External Octagon	3 1/2"	99940A190	00000
		3 3/4"	4 17/64"	8-Point	External Octagon	3 1/2"	99940A210	00000
		3 7/8"	4 27/64"	8-Point	External Octagon	3 1/2"	99940A230	00000
		4 3/8"	4 63/64"	8-Point	External Octagon	3 1/2"	99940A240	00000


		4 1/2"	5 1/8"	8-Point	External Octagon	3 1/2"	99940A250	00000
		4 7/8"	5 35/64"	8-Point	External Octagon	3 1/2"	99940A270	00000
		94 mm	4 7/32"	8-Point	External Octagon	3 1/2"	99940A310	00000
		100 mm	4 31/64"	8-Point	External Octagon	3 1/2"	99940A320	00000

8-Point Impact Sockets

Quickly position these sockets on square fasteners. They are made to withstand the high torque and force of impact tools.

Standard Clearance


		8-Point Socket

3/4" Square Drive—_3/4" square drive size sockets require a locking retainer. Use with an impact wrench that has a pin-style socket retainer, or use a socket retaining ring with tools that have a hole- or hole-and-ring style socket retainer.

	Sockets									Retaining Rings
		Clearance Dp.
	Drive Size	Nut	Bolt	Compatible Retaining Ring ID	Material	Overall Lg.	Socket Shape		Each		Each
3/8" Square Drive



		1/4"	1/4"	1/2"	—	Black-Oxide Steel	1"	8-Point	5553A75	000000	———	0


		5/16"	9/32"	1/2"	—	Black-Oxide Steel	1"	8-Point	5553A535	00000	———	0
		3/8"	5/16"	1/2"	—	Black-Oxide Steel	1"	8-Point	5553A54	00000	———	0
		7/16"	21/64"	1/2"	—	Black-Oxide Steel	1"	8-Point	5553A37	00000	———	0
		1/2"	3/8"	9/16"	—	Black-Oxide Steel	1 1/16"	8-Point	5553A38	00000	———	0
		9/16"	9/16"	5/8"	—	Black-Oxide Steel	1 1/8"	8-Point	5553A39	00000	———	0


		1/2" Square Drive



				3/8"	17/64"	27/32"	—	Black-Oxide Steel	1 1/2"	8-Point	5549A121	00000	———	0


				7/16"	19/64"	27/32"	—	Black-Oxide Steel	1 1/2"	8-Point	5549A122	00000	———	0
				1/2"	11/32"	27/32"	—	Black-Oxide Steel	1 1/2"	8-Point	5549A123	00000	———	0
				9/16"	3/8"	27/32"	—	Black-Oxide Steel	1 1/2"	8-Point	5549A124	00000	———	0
				5/8"	27/32"	27/32"	—	Black-Oxide Steel	1 1/2"	8-Point	5549A125	00000	———	0
				11/16"	27/32"	27/32"	—	Black-Oxide Steel	1 1/2"	8-Point	5549A126	00000	———	0
				3/4"	27/32"	27/32"	—	Black-Oxide Steel	1 1/2"	8-Point	5549A127	00000	———	0
				13/16"	27/32"	27/32"	—	Black-Oxide Steel	1 1/2"	8-Point	5549A128	00000	———	0
				7/8"	31/32"	31/32"	—	Black-Oxide Steel	1 5/8"	8-Point	5549A129	00000	———	0
				15/16"	1 1/64"	1 3/32"	—	Black-Oxide Steel	1 3/4"	8-Point	5549A131	00000	———	0
				1"	1 1/64"	1 3/32"	—	Black-Oxide Steel	1 3/4"	8-Point	5549A132	00000	———	0


				1 1/16"	1 1/64"	1 11/32"	—	Black-Oxide Steel	1 3/4"	8-Point	5549A21	00000	———	0


				3/4" Square Drive



						7/8"	35/64"	1 1/32"	1 5/8"	Black-Oxide Steel	2"	8-Point	5552A123	00000	5552A38	00000


						15/16"	19/32"	1 3/32"	1 5/8"	Black-Oxide Steel	2 1/16"	8-Point	5552A124	00000	5552A38	0000
						1"	5/8"	1 5/32"	1 5/8"	Black-Oxide Steel	2 1/8"	8-Point	5552A125	00000	5552A38	0000
						1 1/16"	21/32"	1 7/32"	1 5/8"	Black-Oxide Steel	2 3/16"	8-Point	5552A126	00000	5552A38	0000
						1 1/8"	45/64"	1 15/64"	1 5/8"	Black-Oxide Steel	2 1/4"	8-Point	5552A127	00000	5552A38	0000
						1 3/16"	1 11/32"	1 1/2"	1 3/4"	Black-Oxide Steel	2 1/2"	8-Point	5552A51	00000	5552A181	0000
						1 1/4"	3/4"	1 13/32"	1 5/8"	Black-Oxide Steel	2 3/8"	8-Point	5552A128	00000	5552A38	0000
						1 5/16"	7/8"	1 13/32"	1 5/8"	Black-Oxide Steel	2 3/8"	8-Point	5552A31	00000	5552A38	0000
						1 7/16"	1 1/2"	1 1/2"	1 3/4"	Black-Oxide Steel	2 3/4"	8-Point	5552A491	00000	5552A181	0000

Deep Clearance


		8-Point Socket

		Clearance Dp.
	Drive Size	Nut	Bolt	Material	Overall Lg.	Socket Shape		Each
1/2" Square Drive



		9/16"	1/2"	2 19/32"	Black-Oxide Steel	3 1/4"	8-Point	5549A157	000000


		5/8"	1/2"	2 19/32"	Black-Oxide Steel	3 1/4"	8-Point	5549A158	00000
		11/16"	1 5/32"	2 19/32"	Black-Oxide Steel	3 1/4"	8-Point	5549A159	00000
		3/4"	1 5/32"	2 19/32"	Black-Oxide Steel	3 1/4"	8-Point	5549A163	00000
		13/16"	1 5/32"	2 19/32"	Black-Oxide Steel	3 1/4"	8-Point	5549A165	00000
		7/8"	1 13/32"	2 27/32"	Black-Oxide Steel	3 1/2"	8-Point	5549A166	00000
		15/16"	1 13/32"	2 27/32"	Black-Oxide Steel	3 1/2"	8-Point	5549A167	00000
		1"	3/4"	2 27/32"	Black-Oxide Steel	3 1/2"	8-Point	5549A168	00000
		1 1/16"	2 35/64"	2 19/32"	Black-Oxide Steel	3 1/2"	8-Point	5549A411	00000

8-Point Socket Sets

With twice as many corners, 8-point sockets grab onto square-drive screws and nuts more quickly than 4-point sockets. Also known as double-square sockets. For use with hand-drive tools only.

Chrome-Plated Steel

	Components Included	Includes	Container Type	Socket Shape	Drive Size		Each
3/8" Square Drive



	7	7 Sockets	Standard: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8"	Metal Clip Rail	8-Point	1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8"	5609A88	000000


	11	11 Sockets	Standard: 1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"	Plastic Clip Rail	8-Point	1/4", 5/16", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8"	5609A111	000000


	1/2" Square Drive



			10	10 Sockets	Standard: 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16"	Metal Clip Rail	8-Point	3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16"	5573A26	000000


			14	14 Sockets	Standard: 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 1 1/16", 1 1/8", 1 1/4"	Metal Clip Rail	8-Point	3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1", 1 1/16", 1 1/8", 1 1/4"	5573A111	000000

Extra-Deep 8-Point Impact Sockets

Extra length allows access to fasteners on long bolts. These sockets quickly position on square fasteners. They are made to withstand the high torque and force of impact tools.

Black-Oxide Steel

		Clearance Dp.					Extra-Deep Clearance
	Drive Size	Nut	Bolt	OD	Socket Shape	For Drive Style	Overall Lg.		Each
1/2" Square Drive



		3/4"	1/2"	4 1/4"	1 5/16"	8-Point	External Square	5"	5549A211	000000


		13/16"	1/2"	4 1/4"	1 1/2"	8-Point	External Square	5"	5549A212	00000
		1"	1/2"	4 1/4"	1 3/4"	8-Point	External Square	5"	5549A213	00000
		1 1/8"	21/32"	4 5/32"	2"	8-Point	External Square	5"	5549A214	00000

Nonsparking 8-Point Impact Sockets

Made of aluminum bronze, these sockets satisfy OSHA requirements that specify nonsparking tools for locations where flammable vapors and combustible residues are present. With twice as many corners, 8-point sockets grab onto square-drive screws and nuts more quickly than 4-point sockets. Also known as double-square sockets. These sockets are sturdier and have more give than manual-drive sockets, so they'll withstand the high torque and force of impact tools. They can also be used with hand-drive tools.

Aluminum Bronze

	Sockets									Ratchet Wrenches
		Clearance Dp.					Standard Clearance
	Drive Size	Nut	Bolt	OD	Socket Shape	For Drive Style	Overall Lg.		Each		Each
1/2" Square Drive



		1 7/16"	3/4"	1 1/8"	2 1/2"	8-Point	External 8-Point, External Square	1 7/8"	93292A110	0000000	6503A3	0000000


		3/4" Square Drive



				1 7/16"	3/4"	1 1/8"	2 1/2"	8-Point	External 8-Point, External Square	2 3/16"	93292A120	000000	6490A31	000000