Product Description
Axle bolt and nut kit, manufacturer part number 22731, designed for load roller axle fitment on manual pallet jacks. Features high-strength SAE 1045 steel bolt (M12 x 1.75, 87 mm long), Grade 8 hex lock nut (Class 10.9), hardness Rockwell C36, torque rating 75 N·m. Supplied with anti-corrosion black phosphate finish. Compatible with 12 mm axle bore, no keyway, intended for securing roller axle to pallet jack frame. No cross-reference part numbers available.
Specifications
Material & Construction
| Nut Material | Steel, Class 10.9 |
| Bolt Hardness | Rockwell C36 |
Part Numbers
| OEM Part Number | 22731 |
| Manufacturer Part Number | 22731 |
Frequently Asked Questions
Q: What are the specifications of the 22731 axle bolt and nut kit?
A: The 22731 kit includes an SAE 1045 steel bolt (M12 x 1.75, 87 mm long) with Rockwell C36 hardness and a Grade 8 hex lock nut (Class 10.9). The bolt has a torque rating of 75 N·m and is supplied with an anti-corrosion black phosphate finish. The kit is designed for 12 mm axle bore with no keyway.
Q: What manual pallet jack models is the 22731 kit compatible with?
A: The 22731 is designed for load roller axle fitment on manual pallet jacks. It fits equipment with 12 mm axle bore. Verify your equipment uses a 12 mm axle bore before ordering to ensure proper fitment.
Q: Why does the 22731 use a Grade 8 lock nut instead of a standard nut?
A: The Grade 8 lock nut (Class 10.9) provides higher tensile strength and vibration resistance during equipment operation. The lock nut prevents axle fastening from loosening due to repetitive load cycling on manual pallet jacks.
Q: What does the black phosphate finish on the 22731 bolt protect against?
A: The anti-corrosion black phosphate finish provides resistance to rust and oxidation. This coating protects the SAE 1045 steel bolt from moisture exposure and corrosion in industrial warehouse and production environments.
Q: What is the torque specification when installing the 22731 bolt?
A: The 22731 bolt has a torque rating of 75 N·m. This specification ensures proper clamp load on the load roller axle without over-tightening the M12 x 1.75 fastening.