Product Description
Lockwasher, SKU 47419-20540-71, engineered for M8 threaded manual pallet jack applications. Manufactured from SAE 1050 hardened steel with phosphate coating, this helical spring washer provides optimal vibration resistance for secure mechanical assembly. Dimensions: 8.2 mm inside diameter, 13.5 mm outside diameter, 1.8 mm thickness. Hardness: Rockwell C38. DIN 127B compliance.
Specifications
Material & Construction
| Material Specification | SAE 1050 hardened steel |
| Hardness | Rockwell C38 |
| Finish/Coating | Phosphate-coated |
Part Numbers
| Manufacturer Part Number | 47419-20540-71 |
| OEM Part Number | 47419-20540-71 |
Frequently Asked Questions
Q: What are the exact specifications for the 47419-20540-71 lockwasher?
A: The 47419-20540-71 is an M8 helical spring lockwasher with inside diameter of 8.2 mm, outside diameter of 13.5 mm, and thickness of 1.8 mm. Material is SAE 1050 hardened steel with phosphate coating. Hardness rating is Rockwell C38. This component complies with DIN 127B industrial standards.
Q: Which manual pallet jack models require the 47419-20540-71 M8 lockwasher?
A: The 47419-20540-71 lockwasher fits M8 threaded fastening points on manual pallet jacks from Crown, Yale, Raymond, Hyster, Clark, and CAT. It is used on hydraulic cylinders, handle assemblies, wheel mounts, and frame brackets. Verify thread size and application before ordering.
Q: What makes SAE 1050 hardened steel suitable for the 47419-20540-71 lockwasher?
A: SAE 1050 steel hardened to Rockwell C38 provides high tensile strength and elastic recovery needed for vibration resistance. This material withstands repeated compression and relaxation cycles on manual pallet jack assemblies without permanent deformation. Phosphate coating protects against corrosion in warehouse and outdoor conditions.
Q: How long does the 47419-20540-71 lockwasher maintain clamping force?
A: The helical spring design of the 47419-20540-71 provides vibration resistance and maintains clamping force through warehouse use cycles. Under normal conditions, the lockwasher maintains preload for 3-5 years. Performance degrades if fasteners experience extreme vibration, thermal cycling, or corrosion that compromises the phosphate coating.
Q: Are there equivalent lockwashers for the 47419-20540-71 M8 application?
A: The 47419-20540-71 is DIN 127B compliant, meaning any DIN 127B M8 helical spring lockwasher with equivalent hardness (Rockwell C38) and phosphate coating provides equivalent performance. Verify dimensions and material certification before substituting. Do not use split-ring or tooth-type washers as direct replacements without engineering confirmation.