O.S. Engine OS55500005 Nord Lock Washer M6 for RC fasteners  [OS55500005]

Nord Lock M6 washer for RC

This Nord Lock style M6 washer from O.S. Engine OS55500005 is an RC-scale locking washer designed to keep M6 fasteners secure where vibration and shock can cause loosening. It is intended for use on model engine mounts, motor and gearbox fixings, and other high-vibration attachment points common in RC cars, buggies, and nitro or gas-powered models.

Installation is straightforward: fit the washer pair against a clean, flat mating surface with the wedge faces opposing each other as designed, then install the M6 screw or nut as usual. The wedge-lock mechanism works by converting bolt rotation into tension retention under vibration, so proper seating and matching washer orientation are important for reliable performance. Avoid installing on damaged threads or uneven surfaces.

In tuning and maintenance the washer plays a preventive role rather than an adjustable one: use it where recurring loosening affects handling or reliability, for example engine mounts, motor brackets, or gearbox fixings. It complements proper thread engagement and correct fastener torque practices to reduce the need for repeated re-tightening during running sessions.