Nm Ratchets | McMaster-Carr

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System of Measurement

Square Drive Size

Unit of Measure

Torque

100 ft·lbf to 249 ft·lbf

250 ft·lbf to 499 ft·lbf

Maximum Torque

Less than 1,000 ft·lbf

1,000 ft·lbf to 1,999 ft·lbf

Head Style

Ratcheting

Overall Length

Certificate Type

Calibration Certificate Traceable to NIST

Calibration Certificate with Test Data

Calibration Certificate with Test Data Traceable to UKAS

Wrench Style

Square Drive

Torque-Limiting Direction

Clockwise

Clockwise and Counterclockwise

Torque Adjustability

Graduations

Display Type

Torque Setting

Grip Material

Torque Wrench Type

Torque-Limiting Mechanism

Power Source

Container Type

Clockwise Accuracy

Material

REACH

Export Control Classification Number (ECCN)

EAR99

RoHS

Compliant

Not Compliant

DFARS Specialty Metals

Exempt

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123 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.

Quick-Release Adjustable Torque Wrenches

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

Nonsparking Torque Wrenches

Made of beryllium copper, these wrenches satisfy OSHA requirements that specify nonsparking tools for locations where flammable vapors and combustible residues are present.

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.

Economy Torque-Measuring Wrenches

These wrenches have an accuracy of ±2.0%.

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.

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.

About Torque Tools

Torque Wrenches

Adjustable Torque Wrenches

Quick-Release Adjustable Torque Wrenches

Nonsparking Torque Wrenches

Electrical-Insulating Adjustable Torque Wrenches

Economy Torque-Measuring Wrenches

Torque-Measuring Wrenches

High-Accuracy Torque-Measuring Wrenches

Data-Recording Torque-and-AngleMeasuring Wrenches

Dial Torque-Measuring Wrenches

High-Accuracy Horizontal-ScaleTorque-Measuring Wrenches

Horizontal-Scale Torque-Measuring Wrenches

Slip-Release Factory-Set Torque Wrenches

T-Handle Slip-ReleaseFactory-Set Torque Wrenches

Click-Style Factory-Set Torque Wrenches

Torque-and-Angle Measuring Socket Adapters

Torque-and-Angle Measuring Socket Adapters

Changeable-Head Torque Wrenches

Changeable-Head Torque Wrenches

Data-Recording Torque-and-Angle
Measuring Wrenches

High-Accuracy Horizontal-Scale
Torque-Measuring Wrenches

T-Handle Slip-Release
Factory-Set Torque Wrenches