cNm Torque Wrenches | McMaster-Carr

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	System of Measurement System of Measurement	Show

cNm

	System of Measurement System of Measurement	Hide

	Minimum Torque Minimum Torque

	Maximum Torque Maximum Torque

	Square Drive Size Square Drive Size

	Torque-Measuring Direction Torque-Measuring Direction

Clockwise and
Counterclockwise

	Certification Certification

Calibration Certificate with
Test Data Traceable to NIST
Certificate of Calibration

Calibration Certificate

	Component Component

Hand-Turned Sensor

Wrench-Attachable Sensor

Gauge

	Gender Gender

Male

Female

	Clockwise Accuracy Clockwise Accuracy

	DFARS (Defense Acquisition Regulations Supplement) DFARS (Defense Acquisition Regulations Supplement)

DFARS Specialty Metals
COTS-Exempt

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

RoHS Compliant

	Counterclockwise Accuracy Counterclockwise Accuracy

	Cord Length Cord Length

4 ft.

8 ft.

	Display Display

Digital Screen

Dial

	Torque Driver Type Torque Driver Type

Torque Limiting

Torque Measuring

	Batteries Included Batteries Included

Yes

	Width Width

	Overall Length Overall Length

	Driver Style Driver Style

	Driver

	Data Log Capacity Data Log Capacity

999

3,500

	Graduations Graduations

	Power Source Power Source

Manual

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

REACH Compliant

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43 Products

About Torque Tools

Set the desired torque and the driver indicates when it's reached. Use with screwdriver bits (not included).

Drivers with click torque limiter signal with an audible click and when the set torque is reached. Turn the collar to adjust torque.

Drivers with slip-release torque limiter slip to disengage and stop turning the fastener when the set torque is reached, preventing overtightening. Turn the chuck to adjust torque.

Ultra-grip drivers have soft, contoured handle for comfort and a secure grip.

Calibration certificate with test data traceable to NIST includes the test measurements that confirm accuracy.

Note: Accuracy ratings do not apply to the lower 20% of the torque range.

								Material
	Torque Range	Graduations	For Bit Hex Shank Size	Clockwise Accuracy	Torque-Limiting Direction	Certification	O'all Lg.	Shaft	Handle	Grip Style		Each
Slip-Release Torque Limiter
cNm
B	2-15 cNm	0.1 cNm	1/4"	±3%	Clockwise	Calibration Certificate with Test Data Traceable to NIST Certificate of Calibration	3 7/8"	Steel	Steel	Plain	0000000	0000000
B	4-30 cNm	0.2 cNm	1/4"	±3%	Clockwise	Calibration Certificate with Test Data Traceable to NIST Certificate of Calibration	3 7/8"	Steel	Steel	Plain	0000000	000000
B	10-60 cNm	0.5 cNm	1/4"	±3%	Clockwise	Calibration Certificate with Test Data Traceable to NIST Certificate of Calibration	4 1/4"	Steel	Steel	Plain	0000000	000000
C	20 to 120 cNm	1 cNm	1/4"	±3%	Clockwise	Calibration Certificate with Test Data Traceable to NIST Certificate of Calibration	5 1/8"	Steel	Plastic	Ultra Grip	0000000	000000
E	40-200 cNm	2 cNm	1/4"	±6%	Clockwise	Calibration Certificate with Test Data Traceable to NIST Certificate of Calibration	6 1/4"	Aluminum	Aluminum	Plain	0000000	000000
E	50-450 cNm	5 cNm	1/4"	±6%	Clockwise	Calibration Certificate with Test Data Traceable to NIST Certificate of Calibration	6 3/4"	Aluminum	Aluminum	Plain	0000000	000000

Static-Control Torque Screwdrivers

Driver

Also known as ESD-safe screwdrivers, the grip drains static away from your application, preventing buildup from electrostatic discharge (ESD) that can damage sensitive equipment. Turn the collar to adjust torque. When set torque is reached, these drivers slip to disengage and stop turning the fastener, preventing overtightening. They come with a calibration certificate that is traceable to NIST and includes the test measurements that confirm accuracy. Drivers have a contoured ultra-grip handle that provides comfort and the best possible grip for achieving maximum torque. The torque adjustment mechanism locks to prevent accidental changes to your setting. Use with screwdriver bits (not included).

Note: Accuracy ratings do not apply to the lower 20% of the torque range.

						Material
Torque Range	Graduations	For Bit Hex Shank Size	Clockwise Accuracy	Certification	Overall Lg.	Shaft	Handle	Driver Style	Surface Resistance, ohms		Each
Slip-Release Torque Limiter
cNm
20-120 N-cm	1 cNm	1/4"	±6%	Calibration Certificate with Test Data Traceable to NIST Certificate of Calibration	7 1/4"	Stainless Steel	Aluminum	Driver	10⁶-10⁹	0000000	0000000

Torque-Measuring Screwdrivers

With 6% Accuracy

A dial shows how torque measurements change as you turn the driver. Use these tools to fasten to a specific torque, determine fastener torque specifications, and identify the torque required to loosen tightened fasteners.

Calibration certificate with test data traceable to NIST includes the test measurements that confirm accuracy.

			Accuracy				Material
Torque Range	Graduations	For Bit Hex Shank Size	Clockwise	Counterclockwise	Certification	O'all Lg.	Shaft	Handle	Includes		Each
in.-oz., cNm
14-70 in.-oz 20-100 cNm	2 in.-oz. 2 cNm	1/4"	±6%	±6%	Calibration Certificate with Test Data Traceable to NIST Certificate of Calibration	7"	Stainless Steel	Aluminum	1/4" Square Drive Socket Adapter	0000000	0000000
14-70 in.-oz 20-100 cNm	5 in.-oz. 4 cNm	1/4"	±6%	±6%	Calibration Certificate with Test Data Traceable to NIST Certificate of Calibration	7"	Stainless Steel	Aluminum	1/4" Square Drive Socket Adapter	0000000	000000

Digital Torque-Measuring Screwdrivers

A green light and a beep alert you when you've reached 90% of your set torque, and a steady tone sounds once you've hit your target. Set your torque in cNm, cm-Kg, or in.-lbs. and quickly check the LCD for real-time measurements along the way. A red light warns if you begin to overtighten. In addition to applying the correct torque to a fastener, these screwdrivers can help determine fastener torque specifications and identify the torque required to loosen tightened fasteners. They store up to nine torque settings to save time when working on multiple fasteners. They're compatible with any bit that has a 1/4" hex shank. All require one AAA battery (included). To save battery power, the display turns off after five minutes of idle time. You can also turn the display off manually.

Accurate to within 2% of the set torque in the clockwise direction, and 3% in the counterclockwise direction, these screwdrivers are more precise than standard torque screwdrivers. All screwdrivers come with a calibration certificate from the manufacturer. Screwdrivers with calibration certificate with test data traceable to NIST include the test measurements that confirm accuracy.

			Accuracy			Material
Torque Range	Graduations	For Bit Hex Shank Size	Clockwise	Counterclockwise	O'all Lg.	Shaft	Handle	Batteries Included		Each
Calibration Certificate
in.-lbs., cNm, cm-kg
0.45-4.4 in.-lbs. 5-50 cNm 0.5-5 cm-kg	0.01 in.-lbs. 0.1 cNm 0.01 cm-kg	1/4"	±2%	±3%	8"	Steel	Plastic	Yes	0000000	0000000
1.7-17.7 in.-lbs. 20-200 cNm 2-20 cm-kg	0.01 in.-lbs. 0.1 cNm 0.01 cm-kg	1/4"	±2%	±3%	8"	Steel	Plastic	Yes	0000000	000000
3.5-35 in.-lbs. 40-400 cNm 4-40 cm-kg	0.01 in.-lbs. 0.1 cNm 0.01 cm-kg	1/4"	±2%	±3%	8"	Steel	Plastic	Yes	0000000	000000
Calibration Certificate with Test Data Traceable to NIST Certificate of Calibration
in.-lbs., cNm, cm-kg
0.45-4.4 in.-lbs. 5-50 cNm 0.5-5 cm-kg	0.01 in.-lbs. 0.1 cNm 0.01 cm-kg	1/4"	±2%	±3%	8"	Steel	Plastic	Yes	0000000	000000
1.7-17.7 in.-lbs. 20-200 cNm 2-20 cm-kg	0.01 in.-lbs. 0.1 cNm 0.01 cm-kg	1/4"	±2%	±3%	8"	Steel	Plastic	Yes	0000000	000000
3.5-35 in.-lbs. 40-400 cNm 4-40 cm-kg	0.01 in.-lbs. 0.1 cNm 0.01 cm-kg	1/4"	±2%	±3%	8"	Steel	Plastic	Yes	0000000	000000

Clean Room Factory-Set Torque Screwdrivers

Rated for ISO Class 5 (Fed. Std. Class 100) clean rooms, these tools have a sealed handle to keep lubrication in and contaminants out. They are factory set to reach the same torque every time. Drivers slip to disengage and stop turning the fastener when the set torque is reached, preventing overtightening. The torque setting cannot be adjusted. Drivers come with a calibration certificate that is traceable to NIST and includes the test measurements that confirm accuracy. Use with screwdriver bits (not included).

							Material
Torque Setting	Torque Setting Increment	For Bit Hex Shank Size	Clockwise Accuracy	Torque-Limiting Direction	Certification	Overall Lg.	Shaft	Handle	Environmental Rating		Each
Slip-Release Torque Limiter
cNm
14-135 cNm	0.1 CnM	1/4"	±6%	Clockwise	Calibration Certificate with Test Data Traceable to NIST Certificate of Calibration	4 3/8"	Steel	Aluminum	Fed. Std. Class 100, ISO Class 5	0000000	0000000
50-400 cNm	0.1 CnM	1/4"	±6%	Clockwise	Calibration Certificate with Test Data Traceable to NIST Certificate of Calibration	5"	Steel	Aluminum	Fed. Std. Class 100, ISO Class 5	0000000	000000

Data-Recording Torque Gauges

Use these gauges with changeable sensors and square-drive sockets (sold separately) to display, collect, and download torque readings. They display torque as it's measured and the maximum torque reached. Gauges can also be used to convert any hand-turned square drive tool into a precise torque-measuring tool.

Note: The accuracy ratings do not apply to the lower 10% of the torque range.

Wrench-attachable sensors fit between your wrench and socket. Use with hand tools only.

Hand-turned sensors don't require a tool; place into your socket and turn them with your hand.

Gauges

in.-oz., in.-lbs., ft.-lbs., Nm, cNm, m-kg, cm.-kg
Features	Lg.	Wd.	Ht.	Data Log Cap.	Batteries Included	Includes	Container Type		Each
Torque Measurement Memory, Programmable Torque Settings, Maximum Torque Display, Keypad, Headphone Jack, Audible Alarm	6"	3"	2 1/2"	3,500	Yes	3-ft Long USB Cable	Plastic Case	0000000	000000000

Wrench-Attachable Sensors with Calibration Certificate with Test Data Traceable to NIST

			Accuracy
Square Drive Size (Gender)	Torque Range	Torque-Measuring Direction	Clockwise	Counterclockwise	Cord Lg., ft.		Each
in.-oz., in.-lbs., ft.-lbs., Nm, cNm, m-kg, cm-kg
1/4" (Female) × 1/4" (Male)	80 to 800 in.-oz. 5 to 50 in.-lbs. 0.417 to 4.17 ft.-lbs. 0.565 to 5.65 Nm 56.5 to 565 cNm 0.058 to 0.576 m-kg 5.76 to 57.6 cm-kg	Clockwise and Counterclockwise	±1%	±1%	4	0000000	0000000
1/4" (Female) × 1/4" (Male)	320 to 3,200 in.-oz. 20 to 200 in.-lbs. 1.67 to 16.7 ft.-lbs. 2.26 to 22.6 Nm 226 to 2,260 cNm 0.23 to 2.3 m-kg 23 to 230 cm-kg	Clockwise and Counterclockwise	±1%	±1%	4	0000000	000000
3/8" (Female) × 3/8" (Male)	120 to 1,200 in.-lbs. 10 to 100 ft.-lbs. 13.6 to 136 Nm 1,356 to 13,560 cNm 1.38 to 13.8 m-kg 138 to 1,383 cm-kg	Clockwise and Counterclockwise	±1%	±1%	4	0000000	000000
1/2" (Female) × 1/2" (Male)	300 to 3,000 in.-lbs. 25 to 250 ft.-lbs. 33.9 to 339 Nm 3,390 to 33,900 cNm 3.46 to 34.6 m-kg 346 to 3,456 cm-kg	Clockwise and Counterclockwise	±1%	±1%	4	0000000	000000
3/4" (Female) × 3/4" (Male)	720 to 7,200 in.-lbs. 60 to 600 ft.-lbs. 81.3 to 813 Nm 8,135 to 81,350 cNm 8.3 to 83 m-kg 830 to 8,295 cm-kg	Clockwise and Counterclockwise	±1%	±1%	8	0000000	000000

Hand-Turned Sensors with Calibration Certificate with Test Data Traceable to NIST

			Accuracy
Square Drive Size (Gender)	Torque Range	Torque-Measuring Direction	Clockwise	Counterclockwise	Cord Lg., ft.		Each
in.-oz., in.-lbs., ft.-lbs., Nm, cNm, m-kg, cm-kg
1/4" (Male)	2 to 20 in.-oz. 0.125 to 1.25 in.-lbs. 0.01 to 0.104 ft.-lbs. 0.014 to 0.141 Nm 1.41 to 14.1 cNm 0.001 to 0.014 m-kg 0.144 to 1.44 cm-kg	Clockwise and Counterclockwise	±2%	±2%	4	0000000	0000000
1/4" (Male)	16 to 160 in.-oz. 1 to 10 in.-lbs. 0.083 to 0.833 ft.-lbs. 0.113 to 1.13 Nm 11.3 to 113 cNm 0.012 to 0.115 m-kg 1.15 to 11.5 cm-kg	Clockwise and Counterclockwise	±2%	±2%	4	0000000	000000

Chuck-Style Torque Tool Testers

Finger-tighten the three-jaw chuck onto a torque wrench or screwdriver, then twist either the gauge or tool to check the tool's accuracy. Use with hand tools only. A pointer shows torque as it's measured. Testers with memory pointer show the maximum torque reached.

Note: The accuracy ratings do not apply to the lower 10% of the torque range.

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

				Accuracy
Torque Range	Graduations	Chuck Capacity	Torque-Measuring Direction	Clockwise	Counterclockwise	Dial OD	Features	Material	Chuck Material	Container Type		Each
With Calibration Certificate with Test Data Traceable to NIST Certificate of Calibration
cNm
0.3 to 3 N-cm	0.05 cNm	1/4"	Clockwise and Counterclockwise	±2%	±2%	1 3/4"	Memory Pointer	Aluminum	Aluminum	Plastic Case	000000000	0000000
0.6 to 6 N-cm	0.1 cNm	1/4"	Clockwise and Counterclockwise	±2%	±2%	1 3/4"	Memory Pointer	Aluminum	Aluminum	Plastic Case	000000000	000000
1 to 12 N-cm	0.2 cNm	1/4"	Clockwise and Counterclockwise	±2%	±2%	1 3/4"	Memory Pointer	Aluminum	Aluminum	Plastic Case	000000000	000000
3 to 24 N-cm	0.5 cNm	1/4"	Clockwise and Counterclockwise	±2%	±2%	1 3/4"	Memory Pointer	Aluminum	Aluminum	Plastic Case	000000000	000000

Chuck-Style Digital Torque Tool Testers


Tester Shown with Stand and Fixture (Sold Separately)	Tester	Testing Fixture
Tester Shown with Stand and Fixture (Sold Separately)	Testing Stand

Measure the torque output of torque wrenches, screwdrivers, and other hand tools to ensure they deliver the right amount of torque—and check your results on a digital screen. Cycle through four units of measure on the screen, then set it to display real-time or maximum torque. These testers have a keyless chuck that's similar to a standard drill chuck: insert the tool you're measuring and tighten the chuck by hand. They can also be used to measure the torque consistency of small rotating parts, such as motors, potentiometers, and encoders.

Testers with calibration certificate with test data traceable to NIST include the test measurements that confirm accuracy.

The tester's memory keeps track of up to 999 different measurements. Use the USB cable and software download link (sold separately) to transmit, store, and analyze test data on a computer. The software stores time, date, and torque measurement values that you can import into Microsoft Excel.

To use the tester on external power, add an AC adapter (sold separately) and attach it with the USB cable (sold separately with the software). Adapter cannot be sold in Canada due to energy efficiency requirements.

For large and oddly shaped items, use a testing fixture (sold separately). Testing fixtures fit inside the tester's chuck and have four clamping pins that allow you to hold objects as wide as 2 1/4".

For handheld use, the display fits inside the back of the tester. To use the tester on a flat surface, remove the display from the back of the tester. For additional stability, mount the tester onto a testing stand (sold separately). Testing stands have four pins that fit inside the tester to anchor it, a handle for leverage, and mounting holes for permanently securing the stand.

				Accuracy
Torque Range	Graduations	Chuck Capacity	Torque-Measuring Direction	Clockwise	Counterclockwise	Material	Chuck Body Material	Chuck Jaw Material	Container Type	Batteries Included		Each
Testers
in.-oz., cNm, mNm, cm-g
0.15 to 0.7 in.-oz. 0.1 to 0.5 cNm 1 to 5 mNm 10 to 50 cm-g	0.001 cNm 0.001 in.-oz. 0.01 mNm 0.1 cm-g	1/4"	Clockwise and Counterclockwise	±2%	±2%	Plastic	Aluminum	Steel	Plastic Case	Yes	0000000	000000000
0.3 to 1.4 in.-oz. 0.2 to 1 cNm 2 to 10 mNm 20 to 100 cm-g	0.001 cNm 0.001 in.-oz. 0.01 mNm 0.1 cm-g	1/4"	Clockwise and Counterclockwise	±2%	±2%	Plastic	Aluminum	Steel	Plastic Case	Yes	0000000	00000000
0.6 to 2.8 in.-oz. 0.4 to 2.0 cNm 4 to 20 mNm 40 to 200 cm-g	0.002 cNm 0.002 in.-oz. 0.02 mNm 0.2 cm-g	1/4"	Clockwise and Counterclockwise	±2%	±2%	Plastic	Aluminum	Steel	Plastic Case	Yes	0000000	00000000
1.5 to 7 in.-oz. 1 to 5 cNm 10 to 50 mNm 100 to 500 cm-g	0.005 cNm 0.005 in.-oz. 0.05 mNm 0.5 cm-g	1/4"	Clockwise and Counterclockwise	±2%	±2%	Plastic	Aluminum	Steel	Plastic Case	Yes	0000000	00000000
3 to 14 in.-oz. 2 to 10 cNm 20 to 100 mNm 200 to 1,000 cm-g	0.01 cNm 0.01 in.-oz. 0.1 mNm 1 cm-g	1/4"	Clockwise and Counterclockwise	±2%	±2%	Plastic	Aluminum	Steel	Plastic Case	Yes	0000000	00000000
Testers with Calibration Certificate with Test Data Traceable to NIST
in.-oz., cNm, mNm, cm-g
0.15 to 0.7 in.-oz. 0.1 to 0.5 cNm 1 to 5 mNm 10 to 50 cm-g	0.001 cNm 0.001 in.-oz. 0.01 mNm 0.1 cm-g	1/4"	Clockwise and Counterclockwise	±2%	±2%	Plastic	Aluminum	Steel	Plastic Case	Yes	0000000	00000000
0.3 to 1.4 in.-oz. 0.2 to 1 cNm 2 to 10 mNm 20 to 100 cm-g	0.001 cNm 0.001 in.-oz. 0.01 mNm 0.1 cm-g	1/4"	Clockwise and Counterclockwise	±2%	±2%	Plastic	Aluminum	Steel	Plastic Case	Yes	0000000	00000000
0.6 to 2.8 in.-oz. 0.4 to 2.0 cNm 4 to 20 mNm 40 to 200 cm-g	0.002 cNm 0.002 in.-oz. 0.02 mNm 0.2 cm-g	1/4"	Clockwise and Counterclockwise	±2%	±2%	Plastic	Aluminum	Steel	Plastic Case	Yes	0000000	00000000
1.5 to 7 in.-oz. 1 to 5 cNm 10 to 50 mNm 100 to 500 cm-g	0.005 cNm 0.005 in.-oz. 0.05 mNm 0.5 cm-g	1/4"	Clockwise and Counterclockwise	±2%	±2%	Plastic	Aluminum	Steel	Plastic Case	Yes	0000000	00000000
3 to 14 in.-oz. 2 to 10 cNm 20 to 100 mNm 200 to 1,000 cm-g	0.01 cNm 0.01 in.-oz. 0.1 mNm 1 cm-g	1/4"	Clockwise and Counterclockwise	±2%	±2%	Plastic	Aluminum	Steel	Plastic Case	Yes	0000000	00000000

AC Adapter	Each	000000
Testing Stand	Each	000000
USB Cable and Software Download Link	Each	00000
Testing Fixture	Each	000000