Product Description
LOCKWASHER
Frequently Asked Questions
Q: What does lockwasher 4278300122 do?
A: This lockwasher prevents vibration-induced loosening of fasteners in manual pallet jack assemblies. The conical design creates spring tension that resists bolt and screw rotation during equipment operation.
Q: Is this lockwasher compatible with manual pallet jacks?
A: Yes. This is a standard OEM replacement lockwasher for manual pallet jacks from most major manufacturers including Crown, Toyota, Raymond, Yale, Hyster, Jungheinrich, and Clark. Confirm part dimensions match your equipment.
Q: How does 4278300122 compare to 42783-00122?
A: These are alternative part number formats for the same lockwasher component. The hyphenated version (42783-00122) and the continuous version (4278300122) refer to identical parts. Either designation can be used interchangeably.
Q: What material is this lockwasher made from?
A: This lockwasher is typically hardened stamped steel with corrosion resistance. The conical spring design provides the locking function that prevents fastener rotation.
Q: When should I replace this lockwasher?
A: Replace this lockwasher whenever it becomes permanently flattened, shows visible corrosion damage, or whenever fasteners are removed and reinstalled. A flattened lockwasher cannot maintain the spring tension needed for vibration resistance.