3/8" Torque Wrenches | McMaster-Carr

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	System of Measurement System of Measurement

	Square Drive Size Square Drive Size	Show

3/8"

	Square Drive Size Square Drive Size	Hide

	Maximum Torque Maximum Torque

	Head Style Head Style


Standard	Flex

	Ratcheting or Nonratcheting Ratcheting or Nonratcheting

Ratcheting

Nonratcheting

	Minimum Torque Minimum Torque

	Wrench Style Wrench Style

	Square Drive

	Torque Adjustability Torque Adjustability

Adjustable

Factory Set

	Certification Certification

Calibration Certificate with
Test Data Traceable to NIST
Certificate of Calibration

Calibration Certificate with
Test Data Traceable to NIST

Calibration Certification
Traceable to NIST

Calibration Certificate
Traceable to NIST

	Torque Wrench Type Torque Wrench Type

Torque Limiting

Torque Measuring

	Graduations Graduations

	Overall Length Overall Length

	Torque-Limiting Direction Torque-Limiting Direction

Clockwise and
Counterclockwise

Clockwise

	Torque-Limiting Mechanism Torque-Limiting Mechanism

Click

Slip Release

Clutch Disengages

	Grip Material Grip Material

	Finish Finish

	Material Material

Steel

	Clockwise Accuracy Clockwise Accuracy

	Power Source Power Source

Manual

Air

Battery

	Individual/Set Individual/Set

Individual

	For Use With For Use With

Screws and Nuts

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

RoHS Compliant

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

REACH Compliant

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126 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.

High-Accuracy Torque-Measuring Wrenches

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

Torque-Measuring Wrenches

Measure with an accuracy of ±2%.

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.

Torque-Limiting Air-Powered Wrenches

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

Adjustable Torque-Limiting Socket Adapters

Set a desired torque within the range.

Factory-Set Torque-Limiting Socket Adapters

Adapters are set to a specific torque and cannot be adjusted.

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.

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

Data-Recording Torque Gauges

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

Square Drive Torque Tool Testers

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

High-Accuracy Torque Tool Testers

These testers have a digital display and are accurate to ±1%.

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.