Torque-Limiting Adapter | McMaster-Carr

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Torque-Limiting Direction

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24 in·lbf to 180 in·lbf

60 in·lbf to 300 in·lbf

120 in·lbf to 480 in·lbf

240 in·lbf to 600 in·lbf

480 in·lbf to 900 in·lbf

720 in·lbf to 1,440 in·lbf

54.2 N-m to 101.7 N-m

81.4 N-m to 162.7 N-m

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Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

REACH

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Clockwise Accuracy

Maximum Rotation Speed

300 rpm

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Calibration Certificate Traceable to NIST

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Plastic Case

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49 Products

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.

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

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	0000000	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	000000	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
1/2" Square Drive
2 5/8"	1 3/4"	120 to 480 in.-lbs. 10 to 40 ft.-lbs. 13.6 to 54.2 Nm	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
2 5/8"	1 3/4"	240 to 600 in.-lbs. 20 to 50 ft.-lbs. 27.1 to 67.8 Nm	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
2 5/8"	2 1/4"	480 to 900 in.-lbs. 40 to 75 ft.-lbs. 54.2 to 101.7 Nm	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
2 11/16"	1 3/4"	120 to 480 in.-lbs. 10 to 40 ft.-lbs. 13.6 to 54.2 Nm	Clockwise	±5%	__	300	Nickel-Plated Steel	00000000	000000	00000000	00000
2 11/16"	1 3/4"	240 to 600 in.-lbs. 20 to 50 ft.-lbs. 27.1 to 67.8 Nm	Clockwise	±5%	__	300	Nickel-Plated Steel	00000000	000000	00000000	00000
2 3/4"	3"	720 to 1,440 in.-lbs. 60 to 120 ft.-lbs. 81.3 to 162.7 Nm	Clockwise and Counterclockwise	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
2 13/16"	3"	720 to 1,440 in.-lbs. 60 to 120 ft.-lbs. 81.3 to 162.7 Nm	Clockwise	±5%	__	300	Nickel-Plated Steel	00000000	000000	00000000	00000

Factory-Set Torque-Limiting Socket Adapters

Socket Adapter

Pin Kit

Already set to a specific torque limit, these adapters audibly click and release when you reach that setting to prevent overtightening.

Adapters with a calibration certificate come with a document traceable to NIST that states the adapters passed a test for accuracy.

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

Socket Adapters
			Accuracy						Replacement Pin Kits
Torque Setting, in.-lbs.	Overall Lg.	OD	Clockwise	Counterclockwise	Max. Speed, rpm	Material		Each		Each
Adapters
3/8" Square Drive
30	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	00000000	0000000	00000000	000000
45	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	00000000	000000	00000000	00000
50	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	00000000	000000	00000000	00000
60	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
75	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
80	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	00000000	000000	00000000	00000
100	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	00000000	000000	00000000	00000
120	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	00000000	000000	00000000	00000
150	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
200	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	00000000	000000	00000000	00000
240	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
300	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	00000000	000000	00000000	00000
1/2" Square Drive
300	2 11/16"	1 3/4"	±5%	±5%	300	Nickel-Plated Steel	00000000	000000	00000000	00000
360	2 11/16"	1 3/4"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
Adapters—Calibration Certificate with Test Data Traceable to NIST Certificate of Calibration
3/8" Square Drive
30	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
45	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
50	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
60	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
75	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
80	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
100	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	0000000	000000	00000000	00000
150	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
180	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
200	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
300	2 3/16"	1 1/2"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
1/2" Square Drive
300	2 11/16"	1 3/4"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000
360	2 11/16"	1 3/4"	±5%	±5%	300	Nickel-Plated Steel	0000000	000000	00000000	00000

Impact Torque-Limiting Socket Adapters

Prevent overtightening that can damage fasteners. These adapters spring back slightly when the set torque is reached. 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.

				Accuracy
Torque Setting, ft.-lbs.	Overall Lg.	OD	For Max. Wrench Working Torque, ft.-lbs.	Clockwise	Counterclockwise	For Max. Wrench Operating Air Pressure, psi	Material	Color		Each
1/2" Square Drive
65	7 5/8"	1 1/8"	250	±10%	±10%	90	Painted Steel	Yellow	0000000	000000
80	7 5/8"	1 1/8"	250	±10%	±10%	90	Painted Steel	Blue	0000000	00000
100	7 5/8"	1 1/8"	250	±10%	±10%	90	Painted Steel	Gray	0000000	00000
120	7 5/8"	1 1/8"	250	±10%	±10%	90	Painted Steel	White	0000000	00000
140	7 5/8"	1 1/8"	250	±10%	±10%	90	Painted Steel	Turquoise	0000000	00000

Impact Torque-Limiting Socket Adapter Sets

Prevent overtightening that can damage fasteners. These adapters spring back slightly when the set torque is reached. 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.

					Accuracy
No. of Pieces	Includes	O'all Lg.	OD	For Max. Wrench Working Torque, ft.-lbs.	Clockwise	Counterclockwise	For Max. Wrench Operating Air Pressure, psi		Each
1/2" Square Drive—Painted Steel
5	Torque-Limiting Adapter with 65 ft.-lbs.Torque Setting—Yellow Torque-Limiting Adapter with 80 ft.-lbs.Torque Setting—Blue Torque-Limiting Adapter with 100 ft.-lbs.Torque Setting—Gray Torque-Limiting Adapter with 120 ft.-lbs.Torque Setting—White Torque-Limiting Adapter with 140 ft.-lbs.Torque Setting—Turquoise	7 5/8"	1 1/8"	250	±10%	±10%	90	0000000	0000000