20 mm Screwdrivers | McMaster-Carr

Reach nuts obstructed by a fluid line or other barrier with the wrench heads in these sets. Connect them to a socket extension and ratchet wrench to turn fasteners where clearance is limited from both the top and side. You can also attach one directly to your ratchet wrench to convert it into an open-ended ratcheting wrench. Also known as crowfoot wrenches.

	Includes	Material	Wrench Opening Shape	Container Type		Each
3/8" Square Drive



	30	Wrench Heads (Inch): 5/16", 11/32", 3/8", 7/16", 1/2", 9/16", 5/8", 11/16", 3/4", 13/16", 7/8", 15/16", 1" Wrench Heads (Metric): 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm	Nickel-Plated Steel	Round	Plastic Clip Rail	5844A123	0000000

Universal-Fit Sockets

Turn multiple shapes and sizes of fasteners with a single socket. Use these on hex, square, and other external-drive fasteners—even wing nuts. Place the socket over the nut or screw head and the 54 pins move to grip it securely. For use with hand-drive tools only.

Sockets


	Universal Socket

	Overall Lg.	OD	Material	Socket Shape		Each
1/2" Square Drive



	7/16"-1 1/4", 11 mm-32 mm	3 1/2"	1 11/16"	Chrome-Plated Steel	Universal	6021A111	000000

6-Point Impact Sockets

Achieve the best possible grip on hex fasteners and prevent rounding. These sockets are made to withstand the high torque and force of impact tools.

Standard Clearance


		6-Point Socket

3/4" Square Drive—_3/4", 1", and 1 _1/2" 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, mm	Nut	Bolt	Compatible Retaining Ring ID	Material	Overall Lg.	Socket Shape		Each		Each
3/8" Square Drive



		20	17/32"	19/32"	—	Black-Oxide Steel	1 1/8"	6-Point	7193A26	000000	———	0


		1/2" Square Drive



				20	13/16"	27/32"	—	Black-Oxide Steel	1 1/2"	6-Point	7205A65	00000	———	0


				3/4" Square Drive



						20	9/16"	63/64"	1 7/16"	Black-Oxide Steel	1 15/16"	6-Point	54175A61	00000	5552A36	00000

Deep Clearance


		6-Point Socket

		Clearance Dp.
	Drive Size, mm	Nut	Bolt	Material	Overall Lg.	Socket Shape		Each
3/8" Square Drive



		20	1/2"	1 3/4"	Black-Oxide Steel	2 5/8"	6-Point	7193A31	000000


		1/2" Square Drive



				20	35/64"	1 61/64"	Black-Oxide Steel	3 1/4"	6-Point	7205A66	00000

6-Point Sockets

The hex shape achieves the best possible grip on hex fasteners to prevent rounding their points. For use with hand-drive tools only.

Chrome-Plated Steel


Standard Clearance	Deep Clearance	6-Point Socket

						Standard Clearance			Deep Clearance
	Drive Size, mm	OD	Specs. Met	Socket Shape	For Drive Style	Overall Lg.		Each	Overall Lg.		Each
3/8" Square Drive



		20	1 3/32"	ASME B107.110	6-Point	External Hex	1 3/16"	5849A26	00000	—	———	0


		20	1 5/64"	ASME B107.110, SAE AS955	6-Point	External Hex	—	———	0	2 3/4"	5849A74	000000


		1/2" Square Drive



				20	1 3/32"	ASME B107.110, SAE AS955	6-Point	External Hex	1 1/2"	7149A63	00000	—	———	0


				20	1 1/16"	ASME B107.110	6-Point	External Hex	—	———	0	3"	7149A248	0000

Sure Grip Wrench Head Sets


Wrench and Socket Extension Not Included

Grip more of your fastener head with these wrench heads. They have a hex or 12-point opening with more surface area than rounded wrench heads, so they make more contact with fasteners for a better hold. Also known as flare-nut crowfoot wrenches or line wrenches, they're often used with flared tube fittings as well as fuel and hydraulic lines. Connect them to a socket extension and ratchet wrench to turn fasteners where clearance is limited from both the top and side. You can also attach one directly to your ratchet wrench to convert it into an open-ended ratcheting wrench.

	Includes	Material	Wrench Opening Shape	Container Type		Each
3/8" Square Drive



	18	Wrench Heads: 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 27 mm	Nickel-Plated Steel	Hex Sure Grip	Plastic Clip Rail	5311A111	0000000

L-Keys

The highest quality L-keys you can buy for tightening and loosening screws. Our L-keys are precision manufactured to tight tolerances for an exact fit.

Alloy Steel—These L-keys handle high torque without bending or breaking, so they’ll last a lifetime.

Short—A short long leg fits into tight spaces where you have less room to swing, making these ideal for confined areas.

		Length					Each		Package
	Drive Size, mm	Overall	Relative	Long Leg	Short Leg	Finish		Each	Pkg. Qty.		Pkg.
Alloy Steel







				Hex

				20	8 1/16"	Short	7 1/4"	2 7/8"	Black Oxide	7289A65	000000	5	7289A651	000000

12-Point Impact Sockets

The 12-point shape quickly positions on hex fasteners. These sockets are made to withstand the high torque and force of impact tools.

Standard Clearance


		12-Point Socket

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



		20	27/32"	21/32"	Black-Oxide Steel	1 1/2"	12-Point	7205A83	000000

12-Point Socket Sets

These tools handle the toughest industrial applications, provide the best grip on fasteners, and have a superior finish. The 12-point shape quickly positions on hex fasteners.

Sockets—Chrome-Plated Steel


	12-Point Socket

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



	21	21 Sockets	Standard: 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm Standard (cont.): 23 mm, 24 mm, 25 mm, 26 mm	Metal Clip Rail	12-Point	6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26	7874N102	0000000


	1/2" Square Drive



			15	15 Sockets	Deep: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 24 mm, 25 mm	Plastic Clip Rail	12-Point	10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 24, 25	7256A12	000000


			15	15 Sockets	Standard: 10 mm, 13 mm, 14 mm, 15 mm, 17 mm, 18 mm, 19 mm, 20 mm, 22 mm, 23 mm, 24 mm, 26 mm, 27 mm, 30 mm, 32 mm	Plastic Clip Rail	12-Point	10, 13, 14, 15, 17, 18, 19, 20, 22, 23, 24, 26, 27, 30, 32	7256A21	000000
			23	23 Sockets	Deep: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm Deep (cont.): 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, 31 mm, 32 mm	Metal Clip Rail	12-Point	10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32	7874N105	000000
			24	24 Sockets	Standard: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm Standard (cont.): 24 mm, 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, 31 mm, 32 mm, 36 mm	Metal Clip Rail	12-Point	10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 36	7874N104	000000


			3/4" Square Drive



					13	13 Sockets	Standard: 19 mm, 20 mm, 22 mm, 24 mm, 27 mm, 30 mm, 32 mm, 36 mm, 41 mm, 46 mm, 50 mm, 55 mm, 60 mm	Metal Clip Rail	12-Point	19, 20, 22, 24, 27, 30, 32, 36, 41, 46, 50, 55, 60	8362A11	000000

Socket Organizers

		Each
Foam Socket Organizer for 22 Piece 3/4" Square Drive Size Set	5243A22	0000000

Sockets with Drive Tools—Chrome-Plated Steel


	12-Point Socket

	Components Included	Includes	Container Type	Socket Shape	Drive Size, mm		Each
1/2" Square Drive



	20	17 Sockets 1 Extension 2 Drive Tools	Standard: 10 mm, 13 mm, 14 mm, 15 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 26 mm, 27 mm, 30 mm, 32 mm, 36 mm 10 3/8" Long Ratchet Wrench 15 1/2" Long Flex-Head Wrench Handle 5" Long Extension	Metal Case	12-Point	10, 13, 14, 15, 17, 18, 19, 20, 21, 22, 23, 24, 26, 27, 30, 32, 36	53195A74	0000000


	28	26 Sockets 2 Drive Tools	Standard: 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm Deep: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm 10" Long Ratchet Wrench 24" Long Flex-Head Wrench Handle	Plastic Case	12-Point	8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21	7874N107	000000

Socket Organizers

		Each
Foam Socket Organizer for 22 Piece 3/4" Square Drive Size Set	5243A22	0000000

12-Point Sockets

The 12-point shape quickly positions on hex fasteners. These sockets are for hand-driven use only.

Chrome-Plated Steel


Standard Clearance	Deep Clearance	12-Point Socket

					Standard Clearance			Deep Clearance
	Drive Size, mm	OD	Socket Shape	For Drive Style	Overall Lg.		Each	Overall Lg.		Each
3/8" Square Drive



		20	1 3/32"	12-Point	External 12-Point, External Hex	1 3/16"	5849A58	00000	—	———	0


		20	1 5/64"	12-Point	External 12-Point, External Hex	—	———	0	2 3/4"	5849A84	000000


		1/2" Square Drive



				20	1 3/32"	12-Point	External 12-Point, External Hex	1 1/2"	7149A22	00000	3 1/4"	7149A45	00000


				3/4" Square Drive



						20	1 17/64"	12-Point	External 12-Point, External Hex	2"	7312A51	00000	—	———	0

6-Point Flex Impact Sockets

Pivot the head to access fasteners from an angle. These sockets have a hex shape that grips hex fasteners and prevents rounding. They are made to withstand the high torque and force of impact tools.

Standard Clearance


		6-Point Socket

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



		20	33/64"	5/8"	Black-Oxide Steel	2 9/16"	6-Point	7205A97	000000

6-Point Socket Sets

These tools handle the toughest industrial applications, provide the best grip on fasteners, and have a superior finish. The hex shape grips hex fasteners and prevents rounding.

Sockets—Chrome-Plated Steel


	6-Point Socket

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



	18	18 Sockets	Deep: 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm	Metal Clip Rail	6-Point	6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23	7936N103	0000000


	21	21 Sockets	Standard: 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm Standard (cont.): 23 mm, 24 mm, 25 mm, 26 mm	Metal Clip Rail	6-Point	6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26	7936N104	000000


	1/2" Square Drive



			15	15 Sockets	Standard: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm	Metal Clip Rail	6-Point	10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24	7256A5	000000

Socket Organizers

		Each
Foam Socket Organizer for 24 Piece 3/8" Square Drive Size Set	5243A19	000000

Economy 12-Point Socket Sets

Suitable for occasional maintenance work, these sets are imported. The 12-point shape quickly positions on hex fasteners.

Sockets—Chrome-Plated Steel


	12-Point Socket

	Components Included	Includes	Container Type	Socket Shape	Drive Size, mm		Each
1/2" Square Drive



	13	13 Sockets	Standard: 12mm, 13mm, 14mm, 15mm, 16mm, 17mm, 18mm, 19mm, 20mm, 21mm, 22mm, 23mm, 24mm	Metal Clip Rail	12-Point	12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24	5880A24	000000

Sockets with Drive Tools—Chrome-Plated Steel


	12-Point Socket

These sets include ratchet wrenches, extensions, and adapters alongside standard and deep sockets, so you have everything needed to reach fasteners in tight or recessed spaces.

	Components Included	Includes	Container Type	Socket Shape	Drive Size, mm		Each
1/2" Square Drive



	14	11 Sockets 1 Drive Tool 2 Extensions	Standard: 10 mm, 12 mm, 13 mm, 14 mm, 15mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 24 mm 7" Long Ratchet Wrench 6" Long Extension 10" Long Extension	Plastic Case	12-Point	10, 12, 13, 14, 15, 17, 18, 19, 20, 21, 24	5880A25	0000000

Economy 6-Point Socket Sets

Suitable for occasional maintenance work, these sets are imported. The hex shape grips hex fasteners and prevents rounding.

Sockets—Chrome-Plated Steel


Metal Clip Rail	6-Point Socket

	Components Included	Includes	Container Type	Socket Shape	Drive Size, mm		Each
1/2" Square Drive



	16	16 Sockets	Deep: 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm	Metal Clip Rail	6-Point	9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24	5894A206	0000000


	24	24 Sockets	Standard: 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm Standard (cont.): 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, 32 mm, 36 mm	Metal Clip Rail	6-Point	9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 32, 36	5894A208	000000
	24	24 Sockets	Deep: 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm Deep (cont.): 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, 32 mm, 36 mm	Metal Clip Rail	6-Point	9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 32, 36	5894A207	000000

Budd Wheel Impact Socket Sets

4-Point

Socket

6-Point

Socket

Retaining Rings

Remove and install dual wheels on trucks and trailers with the sockets in these sets. The sockets are extra deep for use with Budd wheels, so you can remove both the nut and the stud with a single socket. Sets include sockets for hex drives to access lug nuts and sockets for square drives to turn the threaded shafts on inner wheels. All are impact sockets, made to withstand the high torque and force of impact tools. Use them 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
	No. of Pieces	Includes	Color	Overall Lg.	Container Type	Socket Shape		Each		Each
1" Square Drive—Phosphate-Coated Steel



		5	Square Sockets: 17 mm, 20 mm, 21 mm, 13/16" Hex Sockets: 35 mm, 38 mm, 41 mm, 33 mm, 1 1/2"	Black	5 5/8"	Plastic Case	4-Point, 6-Point	90479A110	0000000	5550A611	00000

Wrench Heads


Wrench and Socket Extension Not Included

Reach nuts obstructed by a fluid line or other barrier with these wrench heads. Connect them to your socket extension and ratchet wrench to turn fasteners where clearance is limited from both the top and side. You can also attach one directly to your ratchet wrench to convert it into an open-ended ratcheting wrench. Also known as crowfoot wrenches.

	Overall Lg.	Thk.	Ctr.-to-Ctr. Lg.	Material	Wrench Opening Shape		Each
3/8" Square Drive



	20	1 7/8"	1/4"	1"	Chrome-Plated Steel	Round	5311A42	000000


	1/2" Square Drive



			20	2 5/8"	3/8"	1 5/8"	Chrome-Plated Steel	Round	1882N41	00000

6-Point Impact Socket Sets


	6-Point Socket

The hex shape grips hex fasteners and prevents rounding. These sockets are made to withstand the high torque and force of impact tools.

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.

	Components Included	Includes	Container Type	Socket Shape		Each
1/2" Square Drive—Black-Oxide Steel



	16	16 Sockets	Standard: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 27 mm	Metal Clip Rail	6-Point	5321A16	0000000


	16	16 Sockets	Deep: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 27 mm	Metal Clip Rail	6-Point	5321A21	000000
	25	25 Sockets	Standard: 8 mm; 9 mm; 10 mm; 11 mm; 12 mm; 13 mm; 14 mm; 15 mm; 16 mm; 17 mm; 18 mm; 19 mm; 20 mm; 21 mm; 22 mm; 23 mm; 24 mm Standard (cont.): 25 mm, 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, 32 mm, 36 mm	Metal Clip Rail	6-Point	53105A101	000000
	25	25 Sockets	Deep: 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 25 mm Deep (cont.): 26 mm, 27 mm, 28 mm, 29 mm, 30 mm, 32 mm, 36 mm	Metal Clip Rail	6-Point	53105A102	000000
	30	30 Sockets	Standard: 8 mm, 9 mm,10 mm,11 mm, 12 mm,13 mm, 14 mm, 15 mm,16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 24 mm Deep: 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 22 mm, 24 mm	—	6-Point	53105A103	000000


	3/4" Square Drive—Black-Oxide Steel



			12	12 Sockets	Standard: 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 27 mm, 30 mm, 32 mm, 36 mm, 41 mm, 46 mm	Metal Clip Rail	6-Point	54175A21	000000