20 mm Hex Drivers | McMaster-Carr

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	System of Measurement System of Measurement

Inch

Metric

	Size Size	Show

20 mm

	Size Size	Hide

	Square Drive Size Square Drive Size

3/8"

1/2"

3/4"

	Bolt Clearance Style Bolt Clearance Style


Standard	Deep

	Socket Shape Socket Shape


4-Point	6-Point	12-Point

	For Drive Style For Drive Style


Hex	External Hex	Square

External 12-Point	External Square

	Socket Style Socket Style


Standard	Offset

Flex

	Individual/Set Individual/Set

Individual

Set

	Drive Type Drive Type

Manual

Impact

	Socket Type Socket Type

	Socket

	Finish Finish

Black Oxide

Black Phosphate

Chrome Plated

	Number of Pieces Number of Pieces

	Material Material

Steel

	Overall Length Overall Length

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

	Set Type Set Type

Sockets

Sockets with Drive Tools

	Container Type Container Type

	REACH (Registration, Evaluation, Authorization and Restriction of Chemicals) REACH (Registration, Evaluation, Authorization and Restriction of Chemicals)

REACH Compliant

	RoHS (Restriction of Hazardous Substances) RoHS (Restriction of Hazardous Substances)

RoHS Compliant

	OD OD

	Tip Style Tip Style

	Standard

	Long Leg Length Long Leg Length

7 1/4"

	Bolt Clearance Depth Bolt Clearance Depth

33 Products

L-Keys

Standard Tip

Hex

Turn fasteners from either end and reach into tight spots.

For technical drawings and 3-D models, click on a part number.

	Length
Size	Overall	Long Leg	Short Leg	Material	Finish		Each
Standard Tip
Hex
20 mm	8 1/4"	7 1/4"	2 7/8"	Steel	Black Oxide	0000000	000000

6-Point Sockets

Standard

Deep

Achieve the best possible grip on hex fasteners and prevent rounding.

For technical drawings and 3-D models, click on a part number.

			Standard			Deep
Size	Material	Specifications Met	Overall Lg.		Each	Overall Lg.		Each
3/8" Square Drive
20 mm	Chrome-Plated Steel	ASME B107.110	1 3/16"	0000000	00000	__	000000	00
20 mm	Chrome-Plated Steel	ASME B107.110, SAE AS955	__	000000	00	2 3/4"	0000000	000000
1/2" Square Drive
20 mm	Chrome-Plated Steel	ASME B107.110, SAE AS955	1 1/2"	0000000	00000	__	000000	00
20 mm	Chrome-Plated Steel	ASME B107.5M	__	000000	00	3 1/8"	00000000	0000

12-Point Sockets

Standard

Deep

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

For technical drawings and 3-D models, click on a part number.

		Standard			Deep
Size	Material	Overall Lg.		Each	Overall Lg.		Each
Chrome Plated
3/8" Square Drive
20 mm	Steel	1 3/16"	0000000	00000	2 3/4"	0000000	000000
1/2" Square Drive
20 mm	Steel	1 1/2"	0000000	00000	3 1/4"	0000000	00000
3/4" Square Drive
20 mm	Steel	2"	0000000	00000	__	000000	00

Tight-Clearance Offset Sockets

Often used with an extension, these sockets turn fasteners and fittings in obstructed areas that a regular socket can't reach. They are also known as crowfoot wrenches.

For technical drawings and 3-D models, click on a part number.

3/8" Square Drive
Wrench Opening Shape	Size	Overall Lg.	Thick.	Center-to-Center Lg.	Material		Each
Rounded	20 mm	1 15/16"	1/4"	1"	Chrome-Plated Steel	0000000	000000
1/2" Square Drive
Rounded	20 mm	2 5/8"	3/8"	1 5/8"	Chrome-Plated Steel	0000000	00000

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.

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.

For technical drawings and 3-D models, click on a part number.

Standard

Sockets
	Clearance Depth								Retaining Rings
Size	Nut	Bolt	Compatible Retaining Ring ID	Material	Finish	Overall Lg.		Each		Each
3/8" Square Drive
20 mm	17/32"	19/32"	__	Steel	Black Oxide	1 1/8"	0000000	00000	000000	00
1/2" Square Drive
20 mm	13/16"	27/32"	__	Steel	Black Oxide	1 1/2"	0000000	0000	000000	00
3/4" Square Drive
20 mm	9/16"	63/64"	1 7/16"	Steel	Black Oxide	1 15/16"	00000000	00000	0000000	00000

Deep

	Clearance Depth
Size	Nut	Bolt	Material	Finish	Overall Lg.		Each
3/8" Square Drive
20 mm	15/32"	1 3/4"	Steel	Black Oxide	2 5/8"	0000000	000000
1/2" Square Drive
20 mm	35/64"	1 61/64"	Steel	Black Oxide	3 1/4"	0000000	00000

6-Point Flex Impact Sockets

Standard

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.

For technical drawings and 3-D models, click on a part number.

	Clearance Depth
Size	Nut	Bolt	Material	Finish	Overall Lg.		Each
Standard
1/2" Square Drive
20 mm	33/64"	5/8"	Steel	Black Oxide	2 9/16"	0000000	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.

For technical drawings and 3-D models, click on a part number.

Standard

	Clearance Depth
Size	Nut	Bolt	Material	Finish	Overall Lg.		Each
1/2" Square Drive
20 mm	27/32"	21/32"	Steel	Black Oxide	1 1/2"	0000000	000000

Premium 6-Point Socket Sets

Made in the U.S.A., 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.

For technical drawings and 3-D models, click on a part number.

Sockets—Chrome-Plated Steel

1/2" Square Drive
No. of Pieces	Includes		Each
15	Standard Sockets: 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	000000	0000000

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

1/2" Square Drive
No. of Pieces	Includes		Each
13	Standard Sockets: 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	0000000	000000

Sockets with Drive Tools—Chrome-Plated Steel

1/2" Square Drive
No. of Pieces	Components Included	Includes		Each
14	11 Sockets 1 Drive Tool 2 Extensions	Standard Sockets: 10 mm, 12 mm, 13 mm, 14 mm, 15 mm, 17 mm, 18 mm, 19 mm, 20 mm, 21 mm, 24 mm 7" Long Ratchet Wrench 6" Long Extension 10" Long Extension	0000000	0000000

Premium 12-Point Socket Sets

Made in the U.S.A., 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.

For technical drawings and 3-D models, click on a part number.

Sockets—Chrome-Plated Steel

1/2" Square Drive
No. of Pieces	Includes		Each
15	Deep Sockets: 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	0000000	0000000
15	Standard Sockets: 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	0000000	000000
3/4" Square Drive
13	Standard Sockets: 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	0000000	000000

Sockets with Drive Tools—Chrome-Plated Steel

1/2" Square Drive
No. of Pieces	Components Included	Includes		Each
20	17 Sockets 2 Drive Tools 1 Extension	Standard Sockets: 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	00000000	0000000

Foam Socket Organizer for 22 Piece 3/4" Square Drive Size Set

0000000

Each

0000000

Budd Wheel Impact Socket Sets


Budd Wheel Impact Socket Set	4-Point Socket Shape	6-Point Socket Shape
Budd Wheel Impact Socket Set	Socket Retaining Ring

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.

For technical drawings and 3-D models, click on a part number.

Socket Sets							Socket Retaining Rings
Number of Pieces	Includes	Overall Length	Material	Container Type		Each		Each
1" Drive Size
5	Deep Sockets (Square): 17 mm, 20 mm, 21 mm, 13/16" Deep Sockets (Hex): 35 mm, 38 mm, 41 mm, 33 mm, 1 1/2"	5 5/8"	Black-Phosphate Steel	Plastic Case	000000000	0000000	00000000	00000

6-Point Impact Socket Sets

Sockets

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 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.

1/2" Square Drive—Steel
No. of Pieces	Components Included	Includes	Finish		Each
16	16 Sockets	Standard Sockets: 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	Black Oxide	0000000	0000000
16	16 Sockets	Deep Sockets: 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	Black Oxide	0000000	000000
3/4" Square Drive—Steel
12	12 Sockets	Standard Sockets: 19 mm, 20 mm, 21 mm, 22 mm, 23 mm, 24 mm, 27 mm, 30 mm, 32 mm, 36 mm, 41 mm, 46 mm	Black Oxide	00000000	000000