BJ 059438

Frequently Asked Questions

Q: What is the BJ 059438 Axle Nut and which caster wheel size does it fit?
A: The BJ 059438 is a 1/2-20 UNF hex axle nut engineered for 4 inch caster wheel applications on Big Joe electric lift trucks. It secures the wheel to the axle shaft and maintains proper wheel rotation and load support.

Q: Which Big Joe lift truck models are compatible with the BJ 059438 Axle Nut?
A: The BJ 059438 is designed for Big Joe series 21A, 21P, and 21R electric lift trucks equipped with 4 inch caster wheels. Confirm your equipment falls within these model series before ordering. Do not use this nut on other series or wheel sizes.

Q: What is the material specification and grade of the BJ 059438?
A: The BJ 059438 is manufactured from minimum SAE J995 Grade 5 steel with a hardness range of Rockwell C21-C32. SAE Grade 5 steel provides superior strength and corrosion resistance compared to lower grades, ensuring reliability under heavy lift loads.

Q: How do I verify the BJ 059438 is the correct part for my Big Joe lift truck?
A: Confirm your equipment is a Big Joe series 21A, 21P, or 21R model and that your caster wheels are 4 inches in diameter. The existing axle nut should have a 1/2-20 UNF thread specification. If all three criteria match, BJ 059438 is the correct replacement.

Q: What maintenance or inspection is required for the BJ 059438 Axle Nut?
A: Inspect the axle nut during routine fleet maintenance to ensure it remains tight and secure. A loose or missing nut is a safety hazard that prevents proper wheel function. Replace immediately if the nut is stripped, cracked, corroded, or cannot maintain torque.