O.S. Engine OS55500005 M6 Locking Washer for Model Fasteners  [OS55500005]

M6 Locking Washer Description

This Nord Lock style M6 washer from O.S. Engine OS55500005 is a locking washer intended to prevent M6 fasteners from backing off under vibration. Typical uses include securing engine mounts, motor brackets and gearbox fixings on RC cars, buggies and other high-vibration models.

Fitting is carried out by placing the matched washer pair against a clean, flat mating surface with the wedge faces opposing, then installing the M6 screw or nut. The wedge-lock mechanism converts bolt rotation into retained tension under vibration, so correct washer seating and orientation are important for dependable retention. Avoid use where threads or contact faces are damaged or irregular.

In setup and tuning the washer reduces the need for repeat tightening rather than providing an adjustment function: apply it to attachment points where recurring loosening affects reliability or handling. It pairs with correct thread engagement and proper torque technique to reduce maintenance interruptions during running.