WASHER - COPPER (Mitsubishi MB1B4218000WASHER)

A damaged copper washer can allow fluid or gas to escape from a sealed joint, leading to leaks and potential system failure. During assembly, the washer compresses to fill surface irregularities and create a tight seal. Keeping a copper washer in sound condition helps maintain consistent clamping force and prevents loosening from vibration. This aftermarket replacement part references Mitsubishi as the OE maker and cross-references part number MB1B4218000WASHER. The washer is a type of hardware used to distribute load and prevent galling between mating surfaces. A common failure consequence is that a crushed or over-torqued washer may not reseal, requiring replacement. Verify the serial number or application, then call (562) 693-7748.

Part number variants: MB1B4218000WASHER, mb1b4218000washer