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Box-End Wrench Heads
Attach one of these heads to your square-drive ratchet or torque wrench to extend its reach or to access spaces with limited vertical clearance. Add an extension to get to an obstructed fastener.
When used with a ratchet wrench, it can also help you get more leverage to break a stuck bolt loose. When used with a torque wrench, you can easily calculate your desired torque setting with the precise 2" center-to-center length. Also known as torque adapters.
The box end grips all sides of the fastener to prevent slipping. For use with hand-drive tools only.
For technical drawings and 3-D models, click on a part number.
| Drive Size | Overall Lg. | Thick. | Center-to-Center Lg. | Material | Each | |
3/8" Square Drive | ||||||
|---|---|---|---|---|---|---|
| 3/8" | 2 11/16" | 17/64" | 2" | Chrome-Plated Steel | 00000000 | 000000 |
| 7/16" | 2 3/4" | 19/64" | 2" | Chrome-Plated Steel | 00000000 | 00000 |
| 1/2" | 2 13/16" | 21/64" | 2" | Chrome-Plated Steel | 00000000 | 00000 |
| 9/16" | 2 7/8" | 23/64" | 2" | Chrome-Plated Steel | 00000000 | 00000 |
| 5/8" | 2 7/8" | 25/64" | 2" | Chrome-Plated Steel | 00000000 | 00000 |
| 11/16" | 2 15/16" | 27/64" | 2" | Chrome-Plated Steel | 00000000 | 00000 |
| 3/4" | 3" | 29/64" | 2" | Chrome-Plated Steel | 00000000 | 00000 |
| 13/16" | 2 15/16" | 31/64" | 2" | Chrome-Plated Steel | 00000000 | 00000 |
| 7/8" | 3 1/16" | 33/64" | 2" | Chrome-Plated Steel | 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 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 |
1/2" Square Drive | ||||||||||||
| 3 7/8" | 2 1/8" | 150 to 3,000 in.-lbs. 12.5 to 250 ft.-lbs. 17 to 340 Nm | 1 in.-lbs. 0.1 ft.-lbs. 0.1 Nm | ±2% | ±2% | 300 | 5°-360° | ±1% | Chrome-Plated Steel | Yes | 0000000 | 000000 |
Adjustable Torque-Limiting Socket Adapters
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 | 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
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 |
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 |
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 |
Box-End Wrench Head Sets
Attach one of the heads in these sets to a torque wrench for more leverage to loosen a stubborn fastener. Also known as torque adapters. You can easily calculate your desired torque setting with the precise 2” center-to-center length. The wrench heads can also be connected to an extension to reach fasteners when vertical clearance is limited. The box end grips all sides of the fastener to prevent slipping. For use with hand-drive tools only.
Snap-Open Ratcheting Box-End Wrench Head Sets
Get a strong grip in tight areas, even on fasteners that are rounded or damaged. Open the spring-loaded jaws in these heads to access a fastener like an open-end wrench; the jaws will automatically close when you push against the fastener. The 6-point opening grips hex heads on all sides. Also known as crowfoot wrenches. Attach one to a socket extension to reach obstructed fasteners. With the ratcheting feature, you can turn the fastener without removing and repositioning the wrench head.
| No. of Pieces | Includes | Turn Required to Ratchet | Material | Wrench Opening Shape | Container Type | Each | |
3/8" Square Drive | |||||||
|---|---|---|---|---|---|---|---|
| 6 | Wrench Heads: 8 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm | 15° | Stainless Steel | 6-Point | Foam Tray | 000000000 | 0000000 |
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 |
Torque-Measuring Bit Adapters
Eliminate the need for multiple bulky tools with these bit adapters. At less than 3 inches long, these compact adapters convert 1/4" bit screwdriver handles and 1/4" bits into torque scredrivers so you can fasten to a specific torque. Insert your drive handle and turn clockwise until the hash marks line up with the torque value you need. Not for use with power tools.
For technical drawings and 3-D models, click on a part number.
| For Bit Hex Shank Size | For Drive Style | For Drive Size | Torque Range | Graduations | Clockwise Accuracy | Torque-Measuring Direction | Overall Length | Material | Each | |
With Magnet | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|
in.-lbs. | ||||||||||
| 1/4" | Hex | 1/4" | 6 in.-lbs.-25 in.-lbs. | 4 in.-lbs., 5 in.-lbs. | ±10% | Clockwise | 2 3/16" | Steel | 000000000 | 000000 |
| 1/4" | Hex | 1/4" | 15 in.-lbs.-65 in.-lbs. | 10 in.-lbs. | ±10% | Clockwise | 2 3/4" | Steel | 000000000 | 00000 |
Nm | ||||||||||
| 1/4" | Hex | 1/4" | 2 Nm-6 Nm | 1 Nm | ±10% | Clockwise | 2 3/4" | Steel | 000000000 | 00000 |