WASHER - LOCK (Mitsubishi MB1015996)

A worn lock washer can allow threaded fasteners to loosen under vibration. This aftermarket replacement part references Mitsubishi catalog number MB1015996. The washer type uses a split or tooth design to create tension against the fastener head. Its plain mechanical function is to resist rotational loosening by biting into the mating surface. A concrete generic failure consequence is that a missing or collapsed lock washer may lead to fastener back-out and joint separation. Keeping a lock washer in sound condition helps maintain clamping force in bolted assemblies. Verify the serial number or application, then call (562) 693-7748.

Part number variants: MB1015996, mb1015996