WASHER - LOCK (Mitsubishi MB115548)

A damaged lock washer can allow threaded fasteners to loosen under vibration. During assembly, a lock washer resists rotational loosening by embedding its edges into the mating surface. The catalog reference is Mitsubishi part number MB115548, offered as an aftermarket replacement. This hardware washer type provides a plain mechanical function of increasing friction under the fastener head. A common failure consequence is that a missing or worn lock washer leads to joint separation over time. Keeping a lock washer in sound condition helps maintain clamping force in bolted connections. Verify the serial number or application, then call (562) 693-7748.

Part number variants: MB115548, mb115548