CDI 2002MRMH – 3/8" Drive Micrometer Torque Wrench

The CDI 2002MRMH is a 3/8-inch drive, dual-scale micrometer click-type torque wrench covering 30–200 in-lb (3.4–22.6 Nm) — a range that was practically designed around the most torque-critical small fasteners in light aircraft maintenance. From magneto and timing component hardware to prop governor mounting bolts, fuel injection servo fasteners, and carburetor attachment hardware, this is the range where controlled, documented torque application matters most and where using a wrench operating at the bottom of its scale costs you accuracy.

Why range selection matters as much as the wrench itself

A click-type torque wrench is only accurate from 20% to 100% of its full scale. Mechanics who reach for a 2502MRMH (30–250 in-lb) to torque 40–80 in-lb fasteners are working in the bottom fifth of that wrench's range — exactly where accuracy degrades. The 2002MRMH puts that same hardware squarely in the middle of its scale, where the click mechanism delivers its rated ±4% CW accuracy. That's not a spec argument; it's the difference between a fastener that stays put and one that eventually backs out.

Documentation-ready for certificated maintenance

Every 2002MRMH ships individually serialized with a NIST-traceable certificate of calibration, satisfying the traceability requirements of FAA-accepted maintenance programs, Part 145 repair station QCMs, and ISO 9001 quality systems. Meets or exceeds ASME B107.14 and ISO 6789. Accuracy: ±4% CW, ±6% CCW of indicated value from 20–100% of full scale.

Built for daily professional shop use

• Knurled metal handle withstands sustained professional use — not the lightweight composite grip found on consumer alternatives
• Spring-loaded pull-down lock ring positively locks the torque setting against drift between fasteners
• Laser-marked dual scale reads in-lb and Nm simultaneously — no conversion chart needed
• Fixed ratcheting 3/8" drive head with quick-release button for fast socket changes
• Audible click plus tactile impulse confirms torque in noisy hangar environments
• Rated to a minimum of 5,000 operating cycles
• Made in the USA by CDI Torque Products, a Snap-on Industrial Brands company

Where A&P mechanics reach for the 2002MRMH

• Magneto mounting hardware and ignition timing component fasteners
• Propeller governor mounting bolts and control arm hardware
• Carburetor and fuel injection servo mounting studs and flange bolts
• Oil sump drain plugs and accessory case cover hardware on Continental and Lycoming engines
• Vacuum pump and alternator mounting hardware in the mid-torque range
• Airframe structural fasteners where working range accuracy matters more than maximum capacity

Why source aviation tooling from Pilot John International

Pilot John International is an aviation-specialist distributor — not a general industrial catalog. We serve Part 145 repair stations, FBOs, MRO operations, and flight schools across the U.S. We understand that a torque wrench in a certificated shop is a calibrated instrument, not just a hand tool — and that the documentation behind it is as important as the wrench itself. Our on-site ISO 17025-accredited calibration laboratory keeps your 2002MRMH in the tool crib with a current cert, not sitting idle waiting on a third-party cal lab turnaround.