3/8" Torque Wrenches | McMaster-Carr

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Square Drive Size

Unit of Measure

Torque

250 ft·lbf to 499 ft·lbf

Head Style

Maximum Torque

Less than 1,000 ft·lbf

Ratcheting

Certificate Type

Calibration Certificate Traceable to NIST

Calibration Certificate with Test Data

Torque-Limiting Direction

Clockwise

Clockwise and Counterclockwise

Wrench Style

Drive Style

Torque Adjustability

Torque Setting

2 in·lbf to 80 in·lbf

0.2 ft·lbf to 6.6 ft·lbf

5 in·lbf to 5 ft·lbf

0.5 ft·lbf to 5 ft·lbf

2.5 ft·lbf to 12.5 ft·lbf

2.5 ft·lbf to 8.3 ft·lbf

2.5 ft·lbf to 100 in·lbf

Grip Material

Torque-Limiting Mechanism

Power Source

System of Measurement

Graduations

Torque Wrench Type

Socket Type

Torque-and-Angle Measuring Adapter

Torque-Limiting Adapter

Display Type

Sold As

REACH

Export Control Classification Number (ECCN)

EAR99

DFARS Specialty Metals

RoHS

167 Products

About Torque Tools

Adjustable Torque Wrenches

Set the desired torque and the wrench indicates when it's reached with an audible click and an impulse in the grip.

Flex-Head Adjustable Torque Wrenches

Pivot the head to access fasteners in tight spots.

Quick-Release Adjustable Torque Wrenches

No need to pull the socket off the tool—push a button to release.

No-Reset Adjustable Torque Wrenches

Unlike most torque wrenches, you don’t have to return the torque setting to the lowest value after use. These tools are also known as split-beam torque wrenches.

Electrical-Insulating Adjustable Torque Wrenches

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

Torque-Measuring Wrenches

Measure with an accuracy of ±2%.

High-Accuracy Torque-Measuring Wrenches

Trust the precision of your measurements—these wrenches are accurate to ±1%.

Data-Recording Torque-and-Angle
Measuring Wrenches

The most advanced torque wrenches we offer, these tools store and recall up to 1,500 torque and angle measurements.

Dial Torque-Measuring Wrenches

A main pointer on the dial shows torque as it’s being applied and a memory pointer indicates the maximum torque reached.

High-Accuracy Horizontal-Scale
Torque-Measuring Wrenches

Trust the precision of your measurements—these wrenches are accurate to ±2%.

Horizontal-Scale Torque-Measuring Wrenches

Measure with an accuracy of ±7%.

Slip-Release Factory-Set Torque Wrenches

These wrenches slip to disengage and stop turning the fastener when the set torque is reached, preventing overtightening.

T-Handle Slip-Release
Factory-Set Torque Wrenches

Turn sockets from above when there's not room to swing a standard wrench handle.

Click-Style Factory-Set Torque Wrenches

When the set torque is reached, these wrenches signal with an audible click and an impulse in the grip.

Hammer-Driven Impact Wrenches

Also known as impact drivers, use these tools with impact sockets to break frozen bolts and screws free. Strike with a hammer to tighten and loosen fasteners.

Torque-Limiting Air-Powered Wrenches

Set torque and the wrench will prevent you from exceeding it. These are also known as nutrunners.

Air-Powered Impact Wrenches

Loosen stubborn fasteners—these wrenches operate at full torque counterclockwise to break stuck bolts free.

Cordless Impact Wrenches

Use these wrenches with impact sockets only.

Cordless Ratchet Wrenches

Torque-Limiting Socket Adapters

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.

Adjustable Torque-Limiting Socket Adapters

Set a desired torque within the range.

Factory-Set Torque-Limiting Socket Adapters

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

Changeable-Head Torque Wrenches

Change heads to use these tools as an open-end, box, square drive, or hex-key wrench.

Torque Testers and Gauges

Square Drive Torque Tool Testers

Place your tool and the included square drive connector on the tester and turn.

High-Accuracy Torque Tool Testers

Accurate to within ±1%, these torque testers are often used to check the accuracy of torque wrenches and screwdrivers on assembly lines.

Torque Tool Testers for Torque Screwdrivers

Measure the force of hand and non-impact electric torque screwdrivers to keep fasteners from failing due to under or overtightening.

Rotary Torque Testers

Monitor torque as you apply it—these testers mount between your torque tool and your fastener.

Data-Recording Torque Gauges

Use these gauges with changeable sensors and square-drive sockets to display, collect, and download torque readings.