CDI 2502MRPH – 3/8" Comfort-Grip Torque Wrench

The CDI 2502MRPH is a 3/8-inch drive, dual-scale micrometer click-type torque wrench covering 30–250 in-lb (3.4–27.7 Nm) — the same internal mechanism, NIST-traceable certification, and 11.25-inch overall length as the 2502MRMH, with an ergonomic comfort-grip polymer handle that makes it the lightest wrench in the CDI catalog at 0.70 lb. That 0.25 lb reduction over the metal-handled variant is a 26 percent weight savings that registers in the hand when the arm is extended into an avionics bay or engine accessory area for an extended fastener sequence.

The lightest full-range compact inch-pound wrench CDI makes

A compact 11-inch inch-pound torque wrench is typically held in one hand with the elbow elevated and arm extended — the mechanic supports both the tool and the applied torque through the wrist and forearm without a surface to lean on. At that reach and posture, every ounce matters over a long sequence. The 2502MRPH at 0.70 lb is also light and short enough to carry in a breast pocket or shirt pocket during line maintenance, quick-turn service, and pre-flight discrepancy work where returning to the tool bag between fasteners wastes time. The 30–250 in-lb range covers the full spectrum of compact inch-pound aviation work — magneto and accessory hardware at the low end, fuel fittings and instrument panel fasteners through the middle, intake manifold hardware toward the top — in a single tool that weighs less than a pound.

When the metal handle (2502MRMH) is the better choice

The 2502MRMH knurled metal handle provides better grip in oily or contaminated conditions and greater long-term chemical resistance to hydraulic fluid, avgas, and common shop solvents. Shops doing engine-adjacent work where the wrench regularly contacts fluids typically prefer the metal handle. Both wrenches carry the same internal mechanism, the same ±4% CW accuracy, and the same NIST-traceable documentation — the choice is the grip surface and 0.25 lb.

Documentation-ready for certificated maintenance

Every 2502MRPH ships individually serialized with a NIST-traceable certificate of calibration, satisfying traceability requirements in 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.

The widest-range compact inch-pound comfort-grip wrench in the CDI lineup

• 0.70 lb — the lightest wrench in the CDI catalog, 26% lighter than the metal-handled 2502MRMH
• 11.25" overall length — compact enough for avionics bays, instrument tunnels, and engine accessory areas
• Light and short enough to carry in a breast pocket during line maintenance and quick-turn service
• 30–250 in-lb (3.4–27.7 Nm) covers the widest compact inch-pound range in the MRPH family
• 1 in-lb graduation with ergonomic polymer grip for extended single-hand fastener sequences
• Spring-loaded pull-down lock ring locks the setting before entering confined access spaces
• Laser-marked dual scale reads in-lb and Nm simultaneously — no conversion chart needed
• Fixed ratcheting 3/8" drive head with quick-release button
• Audible click plus tactile impulse confirms torque in noisy hangar and ramp 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 and line techs reach for the 2502MRPH

• Magneto mounting hardware, ignition harness anchor nuts, and timing component fasteners (30–80 in-lb)
• Fuel injection servo, carburetor, and fuel system fitting hardware (40–120 in-lb)
• Instrument panel fasteners and avionics tray hardware requiring single-hand application
• Engine accessory case and gearbox cover fasteners through the full 30–250 in-lb band
• Intake manifold hardware and upper-range airframe fasteners (200–250 in-lb)
• Line maintenance and quick-turn service where tool bag access between fasteners is impractical

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. Whether your shop runs metal or comfort-grip handles, both CDI variants come from the same aviation-specialist source with the same NIST-traceable documentation — and both can be recertified by our on-site ISO 17025-accredited calibration laboratory when they come due.