LOCK WASHER (Mitsubishi MB0000-000379-00)

MB0000-000379-00: A damaged lock washer can allow threaded fasteners to loosen under vibration, leading to joint failure. During assembly, a lock washer’s split or toothed design creates spring tension that resists rotation. Keeping a lock washer in sound condition helps maintain consistent clamping force in bolted connections. This aftermarket replacement part references Mitsubishi as the OE maker and carries the cross-reference part number MB0000-000379-00. The part type is a hardware washer, and its general function is to prevent nuts or bolts from backing out due to dynamic loads. A common failure consequence is that a worn or crushed lock washer loses its locking ability, resulting in fastener loosening over time. Verify the serial number or application, then call (562) 693-7748.

Part number variants: MB0000-000379-00, mb0000-000379-00, MB000000037900, mb000000037900