Rpm 70510 Threaded Hinge Pins For The Traxxas X-MaxxRPM Threaded hinge pins work with stock Traxxas A Arms as well as RPM A Arms, are manufactured from stainless steel, and are tough as nails! If you have lost or damaged your stock hinge pins, or perhaps you're tired of losing those tiny hinge pin retaining screws, give RPM Threaded hinge pins a shot and never look back! tech notes: RPM Threaded hinge pins are 4mm x 56mm. Each kit comes with 4 Threaded hinge pins and 4 M3 locknuts. These hinge pins can