WASHER - COPPER (CAT CT005637)

A worn copper washer can allow fluid seepage at threaded connections. This aftermarket replacement part references CAT as the OE maker and cross-references part number CT005637. The washer type provides a deformable sealing surface between a fastener head and its mating component. A plain mechanical function is to compress under torque, filling microscopic gaps in the joint. A generic failure consequence is that a crushed or missing washer may lead to gradual leakage under system pressure. Verify the serial number or application, then call (562) 693-7748. The part is cataloged as a hardware washer in the copper material category.

Part number variants: CT005637, ct005637