3/8" Square Drive Size Extensions

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	System of Measurement System of Measurement

Inch

ft.-lbs.

in.-lbs.

	Square Drive Size Square Drive Size	Show

3/8"

	Square Drive Size Square Drive Size	Hide

	Socket Type Socket Type

	Extension
	Hex Shank to Square Drive Adapter
	Square Drive Size Adapter
	Secure-Hold Extension
	Flex Adapter
	Torque-Limiting Adapter
	Secure-Hold Socket Adapter
	Torque-and- Angle Measuring Adapter
	Ratchet Adapter

	Length Length

	Finish Finish

	Material Material

Steel

	Drive Type Drive Type

Manual

Impact

Nonimpact Power

	Individual/Set Individual/Set

Individual

Set

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

DFARS Specialty Metals
COTS-Exempt

	Square Drive Gender Square Drive Gender

Female

Male

	Number of Pieces Number of Pieces

	Hex Shank Size Hex Shank Size

1/4"

7/16"

	Socket Retainer Style Socket Retainer Style

Ball Detent

	Shank Type Shank Type

	Quick-Change Hex

	Maximum Access Angle Maximum Access Angle

16°

	Container Type Container Type

Plastic Case

Metal Clip Rail

	Maximum Torque Maximum Torque

5 to 249.9 in.-lbs.

250 to 499.9 in.-lbs.

1,000 in.-lbs. or greater

20.3 Nm

33.9 Nm

135 Nm

	Torque Adjustability Torque Adjustability

Factory Set

Adjustable

	Minimum Torque Minimum Torque

	Torque-Limiting Direction Torque-Limiting Direction

Clockwise and
Counterclockwise

Clockwise

	Clockwise Accuracy Clockwise Accuracy

±5%

±2%

	Torque Setting Torque Setting

	Maximum Speed Maximum Speed

300 rpm

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77 Products

About Torque Tools

Attach to your socket for a longer reach.

Chrome Plated
Overall Lg.	Material		Each
3/8" Square Drive
1 3/4"	Steel	0000000	00000
3"	Steel	0000000	0000
6"	Steel	0000000	00000
8"	Steel	0000000	00000
12"	Steel	0000000	00000
17 1/4"	Steel	0000000	00000
24"	Steel	0000000	00000
34"	Steel	0000000	00000
Black
3/8" Square Drive
1 3/4"	Steel	00000000	0000
3"	Steel	00000000	0000
6"	Steel	00000000	00000
8"	Steel	00000000	00000
12"	Steel	00000000	00000

Electrical-Insulating Socket Extensions

Insulated to protect against accidental contact with live electrical circuits, these extensions are tested to 1,000 volts to meet IEC 60900.

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

3/8" Square Drive
Overall Lg.	Material	Specifications Met		Each
5"	Plastic-Coated Steel	IEC 60900	00000000	000000
10"	Plastic-Coated Steel	IEC 60900	00000000	00000

Wobble Socket Extensions

The square drive has a rounded shape that allows the extension to pivot inside the socket opening and turn it from an angle.

3/8" Square Drive
Overall Lg.	Max. Access Angle	Material		Each
1 3/4"	16°	Chrome-Plated Steel	0000000	00000
3"	16°	Chrome-Plated Steel	0000000	00000
6"	16°	Chrome-Plated Steel	0000000	00000
8"	16°	Chrome-Plated Steel	0000000	00000
12"	16°	Chrome-Plated Steel	0000000	00000
17 1/4"	16°	Chrome-Plated Steel	0000000	00000

Secure-Hold Socket Extensions

Lock your socket into the extension to prevent accidental disengagement. Pull the collar to lock or release.

3/8" Square Drive
Overall Lg.	Material		Each
3"	Chrome-Plated Steel	0000000	000000
6"	Chrome-Plated Steel	0000000	00000
12"	Chrome-Plated Steel	0000000	00000

Flexible Socket Extensions

Bend these extensions around obstructions to turn hard-to-reach fasteners.

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

3/8" Square Drive
Overall Lg.	Material		Each
8"	Chrome-Plated Steel	0000000	000000
11"	Chrome-Plated Steel	0000000	00000

Square Drive Size Adapters

Convert from one square drive size to another.

		Chrome Plated			Black
Square Drive Size (Gender)	Material	Overall Lg.		Each	Overall Lg.		Each
1/4" (Female) × 3/8" (Male)	Steel	1"	0000000	00000	1"	00000000	00000
3/8" (Female) × 1/4" (Male)	Steel	1 1/16"	0000000	00000	1 1/8"	00000000	0000
3/8" (Female) × 1/2" (Male)	Steel	1 5/16"	0000000	0000	1 5/16"	00000000	00000
1/2" (Female) × 3/8" (Male)	Steel	1 3/8"	0000000	0000	5"	00000000	00000

Convertible Square Drive Size Adapters

Push the square drive through the adapter to change size.

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

Square Drive Size (Gender)	Overall Lg.	Material		Each
1/2" (Female) × 3/8" (Male) 3/8" (Female) × 1/2" (Male)	3 1/8"	Chrome-Plated Steel	0000000	00000

Electrical-Insulating Square Drive Size Adapters

Insulated to protect against accidental contact with live electrical circuits, these adapters are tested to 1,000 volts to meet IEC 60900.

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

Square Drive Size (Gender)	Overall Lg	Material	Specifications Met		Each
3/8" (Female) × 1/4" (Male)	1 1/16"	Plastic-Coated Steel	IEC 60900	00000000	000000
3/8" (Female) × 1/2" (Male)	1 7/16"	Plastic-Coated Steel	IEC 60900	00000000	00000
1/2" (Female) × 3/8" (Male)	1 3/8"	Plastic-Coated Steel	IEC 60900	00000000	00000

Flex Socket Adapters

Pivot the head to access fasteners from an angle.

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

3/8" Square Drive
Overall Lg.	Material	Finish		Each
2"	Steel	Chrome Plated	0000000	000000

Adjustable Torque-Limiting Socket Adapters

Socket Adapter

Pin Kit

To set torque, remove the snap ring and locking plate and adjust the nut. When the torque setting is reached, the adapter clicks and releases. These tools let you accurately measure or limit the torque you apply to prevent overtightening and damaging fasteners.

Use clockwise and counterclockwise adapters to tighten fasteners in both directions. You’ll need to change tools to loosen the fasteners.

Use clockwise adapters to tighten fasteners in the clockwise direction as well as loosen them in the counterclockwise direction. There’s no need to change tools.

Socket Adapters										Replacement Pin Kits
Overall Lg.	OD	Torque Range	Torque-Limiting Direction	Clockwise Accuracy	Counterclockwise Accuracy	Max. Speed, rpm	Material		Each		Each
3/8" Square Drive
2 1/8"	1 1/2"	24 to 180 in.-lbs. 2 to 15 ft.-lbs. 2.7 to 20.3 Nm	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	000000
2 1/8"	1 1/2"	60 to 300 in.-lbs. 5 to 25 ft.-lbs. 6.8 to 33.9 Nm	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	0000000	00000	00000000	00000
2 3/16"	1 1/2"	24 to 180 in.-lbs. 2 to 15 ft.-lbs. 2.7 to 20.3 Nm	Clockwise	±5%	__	300	Nickel-Plated Steel	00000000	000000	00000000	00000
2 3/16"	1 1/2"	60 to 300 in.-lbs. 5 to 25 ft.-lbs. 6.8 to 33.9 Nm	Clockwise	±5%	__	300	Nickel-Plated Steel	00000000	000000	00000000	00000

Factory-Set Torque-Limiting Socket Adapters

Socket Adapter

Pin Kit

When the torque setting is reached, these adapters click and release. They are set to a specific torque and cannot be adjusted. Adapters let you accurately measure or limit the torque you apply to prevent overtightening and damaging fasteners.

Socket Adapters
			Accuracy						Replacement Pin Kits
Torque Setting, in.-lbs.	Overall Lg.	OD	Clockwise	Counterclockwise	Max. Speed, rpm	Material		Each		Each
3/8" Square Drive
60	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	0000000	00000000	000000
75	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
120	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	00000000	000000	00000000	00000
180	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
240	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000

Torque-and-Angle Measuring Socket Adapters

A digital display shows how torque measurements change as you turn the wrench. Set the desired torque or and angle—lights and an audible alarm indicate when target has been reached or exceeded.

Note: The accuracy ratings do not apply to the lower 10% of the torque range.

				Accuracy
Overall Lg.	OD	Torque Range	Graduations	Clockwise	Counterclockwise	Max. Speed, rpm	Angle	Angle Accuracy	Material	Batteries Included		Each
3/8" Square Drive
3 1/2"	2 1/8"	60 to 1,200 in.-lbs. 5 to 100 ft.-lbs. 6.78 to 135 Nm	1 in.-lbs. 0.1 ft.-lbs. 0.1 Nm	±2%	±2%	300	5°-360°	±1%	Chrome-Plated Steel	Yes	0000000	0000000

Secure-Hold Socket Adapters

Lock the adapter on your tool and the socket to the adapter to prevent accidental disengagement. A set screw keeps the adapter on your tool; pull the collar to lock or release the socket from the adapter.

Square Drive Size (Gender)	Overall Lg.	Material	Finish		Each
3/8" (Female) × 3/8" (Male)	2 1/16"	Steel	Black	0000000	000000

Ratcheting Socket Adapters

Change a standard wrench handle into a ratcheting wrench.

3/8" Square Drive
Overall Lg.	Material		Each
2 1/16"	Chrome-Plated Steel	000000	000000

Impact Socket Extensions

Attach to your socket for a longer reach. These extensions are made to withstand the high torque and force of impact tools.

3/8" Square Drive
Overall Lg.	Material	Finish		Each
3"	Steel	Black	0000000	000000
6"	Steel	Black	0000000	00000
12"	Steel	Black	0000000	00000

Secure-Hold Impact Socket Extensions

Lock your socket into the extension to prevent accidental disengagement. Pull the collar to lock or release. These extensions are made to withstand the high torque and force of impact tools.

3/8" Square Drive
Overall Lg.	Material	Finish		Each
3"	Steel	Black	00000000	000000
6"	Steel	Black	00000000	00000
12"	Steel	Black	00000000	00000

Impact Square Drive Size Adapters

Convert from one square drive size to another. These adapters are made to withstand the high torque and force of impact tools.

Square Drive Size (Gender)	Overall Lg.	Material	Finish		Each
1/4" (Female) × 3/8" (Male)	1"	Steel	__	0000000	000000
3/8" (Female) × 1/4" (Male)	1 1/4"	Steel	__	0000000	00000
3/8" (Female) × 1/2" (Male)	1 1/4"	Steel	Black	0000000	0000
1/2" (Female) × 3/8" (Male)	1 1/2"	Steel	Black	0000000	00000

Impact Flex Socket Adapters

Also known as universal joints, these adapters have a pivoting head that lets you access fasteners from an angle. They are made to withstand the high torque and force of impact tools.

3/8" Square Drive
Overall Lg.	Material	Finish		Each
2 1/16"	Steel	Black	0000000	000000

Hex Shank to Power Socket Square Drive and Impact Square Drive Adapters

Ball Detent Socket Retainer

Pin Socket Retainer

Use sockets with tools that accept hex shanks, such as impact drivers and power drills. Made for durability, these sockets are for use with nonimpact power tools in high-volume production and assembly. They are also made to withstand the high torque and force of impact tools.

3/8" Square Drive
Hex Shank Size	Overall Lg.	Material	Finish	Socket Retainer Style		Each
1/4"	2"	Steel	__	Ball Detent	00000000	00000
1/4"	2"	Steel	Black	Pin	0000000	0000
1/4"	4"	Steel	Black	Pin	0000000	0000
1/4"	6"	Steel	Black	Pin	0000000	0000
7/16"	2 3/4"	Steel	Black	Pin	0000000	00000

Flexible Power Socket Extensions

Bend these extensions around obstructions to access hard-to-reach fasteners. Made for durability, these sockets are for use with nonimpact power tools in high-volume production and assembly. They are not for use with impact tools.

3/8" Square Drive
Overall Lg.	Material	Socket Retainer Style		Each
3 3/8"	Chrome-Plated Steel	Ball Detent	0000000	000000

Socket Extension Sets

Attach to your socket for a longer reach.

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

3/8" Square Drive
No. of Pieces	Overall Lg.	Material		Each
3	3", 6", 12"	Chrome-Plated Steel	0000000	000000

Secure-Hold Socket Extension Sets

Lock your socket into the extension to prevent accidental disengagement. Pull the collar to lock or release.

3/8" Square Drive
No. of Pieces	Overall Lg.	Material		Each
3	3", 6", 12"	Chrome-Plated Steel	0000000	000000

Square Drive Size Adapter Sets

Convert from one square drive size to another.

Flex adapters pivot to access fasteners from an angle.

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

Square Drive Size Adapters

No. of Pieces	Includes	Material	Finish		Each
6	Manual-Drive Chrome-Plated Square Drive Size Adapter—1/4" Female × 3/8" Male Manual-Drive Chrome-Plated Square Drive Size Adapter—3/8" Female × 1/4" Male Manual-Drive Chrome-Plated Square Drive Size Adapter—3/8" Female × 1/2" Male Manual-Drive Chrome-Plated Square Drive Size Adapter—1/2" Female × 3/8" Male Manual-Drive Chrome-Plated Square Drive Size Adapter—1/2" Female × 3/4" Male Manual-Drive Chrome-Plated Square Drive Size Adapter—3/4" Female × 1/2" Male	Steel	Chrome Plated	00000000	000000

Square Drive Size Adapters and Flex Adapters

No. of Pieces	Includes	Material	Finish		Each
10	Manual-Drive Chrome-Plated Square Drive Size Adapter—1/4" Female × 3/8" Male Manual-Drive Chrome-Plated Square Drive Size Adapter—3/8" Female × 1/4" Male Manual-Drive Chrome-Plated Square Drive Size Adapter—3/8" Female × 1/2" Male Manual-Drive Chrome-Plated Square Drive Size Adapter—1/2" Female × 3/8" Male Manual-Drive Chrome-Plated Square Drive Size Adapter—1/2" Female × 3/4" Male Manual-Drive Chrome-Plated Flex Adapter—1/4" Female × 1/4" Male Manual-Drive Chrome-Plated Flex Adapter—3/8" Female × 3/8" Male Impact-Drive Black Flex Adapter—1/4" Female × 1/4" Male Impact-Drive Black Flex Adapter—3/8" Female × 3/8" Male Impact-Drive Black Flex Adapter—1/2" Female × 1/2" Male	Steel	Black, Chrome Plated	00000000	0000000

Impact Socket Extension Sets

Attach to your socket for a longer reach. These extensions are made to withstand the high torque and force of impact tools.

3/8" Square Drive
No. of Pieces	Overall Lg.	Material	Finish		Each
3	3", 6", 12"	Steel	Black	00000000	000000

Secure-Hold Impact Socket Extension Sets

Lock your socket into the extension to prevent accidental disengagement. Pull the collar to lock or release. These extensions are made to withstand the high torque and force of impact tools.

3/8" Square Drive
No. of Pieces	Overall Lg.	Material	Finish		Each
3	3", 6", 12"	Steel	Black	00000000	000000

Impact Square Drive Size Adapter Sets

Convert from one square drive size to another. These adapters are made to withstand the high torque and force of impact tools.

Flex adapters pivot to access fasteners from an angle.

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

Square Drive Size Adapters

3/8", 1/2", 3/4", 1" Square Drive
No. of Pieces	Includes	Material	Finish		Each
6	3/8" Female × 1/2" Male Square Drive Size Adapter 1/2" Female × 3/8" Male Square Drive Size Adapter 1/2" Female × 3/4" Male Square Drive Size Adapter 3/4" Female × 1/2" Male Square Drive Size Adapter 3/4" Female × 1" Male Square Drive Size Adapter 1" Female × 3/4" Male Square Drive Size Adapter	Steel	Black	00000000	0000000

Square Drive Size Adapters and Flex Adapters

1/4", 3/8", 1/2", 3/4" Square Drive
No. of Pieces	Includes	Material	Finish		Each
7	3/8" Female × 1/2" Male Square Drive Size Adapter 1/2" Female × 3/8" Male Square Drive Size Adapter 1/2" Female × 3/4" Male Square Drive Size Adapter 3/4" Female × 1/2" Male Square Drive Size Adapter 1/4" Female × 1/4" Male Flex Adapter 3/8" Female × 3/8" Male Flex Adapter 1/2" Female × 1/2" Male Flex Adapter	Steel	Black	00000000	0000000