WASHER - LOCK (Komatsu KO3KA-21-11710)

A worn lock washer can allow threaded fasteners to loosen under vibration. This aftermarket replacement part references the Komatsu catalog number KO3KA-21-11710. A lock washer functions by creating tension between the fastener head and the mating surface. Its plain mechanical action resists rotational loosening during normal operation. A common failure consequence is that a missing or crushed lock washer leads to fastener back-out and joint separation. The item ships at approximately 0.004 pounds. Verify the serial number or application, then call (562) 693-7748.

Part number variants: KO3KA-21-11710, ko3ka-21-11710, KO3KA2111710, ko3ka2111710