M7 NC-3831 3/8-Inch Pneumatic Impact Wrench
The M7 NC-3831 offers a 3/8-inch square drive and an 80–120 ft-lb forward torque range for comparing smaller-drive pneumatic impacts. Its 7.28-inch body, 2.9 lb listed weight and hanging split ring are practical details for a bench or service-cart setup.
Specifications and included details
- 3/8-inch square drive and listed forward torque 80–120 ft-lb.
- 7.28-inch tool length, 2.9 lb weight and hanging split ring.
- 8,000 RPM free speed, 10 CFM average air consumption and 90 PSI specification.
- Listed bolt capacity 1/2 inch; twin-dog clutch.
Before ordering
Select the socket opening for the actual fastener and match its drive to 3/8 inch. The torque range is not a precision tightening adjustment. Check compressor delivery for the work pattern and use a torque wrench for final torque specifications.
Product questions and answers
Does the 1/2-inch bolt capacity mean it takes 1/2-inch drive sockets?
No. This tool uses a 3/8-inch square drive. Bolt capacity is separate from the socket interface and opening.
Can I set the impact to exactly 80 ft-lb?
The listed 80–120 ft-lb range is not a calibrated setting scale. Use an appropriate torque wrench for a specified tightening value.
What is the split ring used for?
It provides a hanging point when storing the tool. The listing does not establish a load rating or inclusion of a supporting hook.
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