Product Description
Crown 1/4-28 UNF fine-thread hex nut engineered for electric lift truck mechanical assemblies. Constructed from Grade 5 steel with clear trivalent chromate finish, this direct replacement fastener delivers superior vibration resistance and secure fastening in high-duty industrial applications. Cross-compatible with Clark 62D000004 and equivalent fastening solutions across leading material handling equipment brands.
Specifications
Dimensional Specifications
| Pitch | 28 threads per inch |
Material & Construction
| Material Specification | SAE J995 Grade 5 steel |
| Hardness | Rockwell C25 minimum |
Part Numbers
| Manufacturer Part Number | CR 60021-8 |
| OEM Part Number | 60021-8 |
| Cross-Reference Part Numbers | Equivalent to 62D000004 (Clark), 62D000004B (Bobcat), 62D04J (Clark) |
| Supersedes/Replaces Part Numbers | 60021-8 replaces 060021-008 |
Frequently Asked Questions
Q: What is the CR 60021-8 and what equipment does it fit?
A: The CR 60021-8 is a Crown OEM hex nut featuring 1/4-28 UNF fine-thread specifications. It is compatible with Crown electric lift trucks and equivalent material handling equipment from Toyota, Raymond, Yale, Hyster, Linde, Clark, Mitsubishi, Caterpillar, and BT. This nut crosses to Clark 62D000004 and Bobcat 62D000004B.
Q: What are the material and construction specifications for the CR 60021-8?
A: The CR 60021-8 is constructed from SAE J995 Grade 5 steel with clear trivalent chromate finish. It features Rockwell hardness of C25 minimum, providing superior strength and corrosion resistance. The 1/4-28 UNF fine thread offers precise engagement and secure fastening in lift truck mechanical assemblies.
Q: What are the cross-reference part numbers for the CR 60021-8?
A: The CR 60021-8 cross-references to Clark 62D000004, Bobcat 62D000004B, and Clark 62D04J. It supersedes legacy part number 060021-008. When ordering replacements, verify thread specifications match your equipment to ensure proper fitment.
Q: How does the fine-thread UNF specification benefit the CR 60021-8?
A: The 1/4-28 UNF fine thread provides better vibration resistance and more precise adjustment compared to coarse threads. Fine-thread nuts are less prone to loosening in equipment subject to continuous operation and vibration, making them ideal for industrial lift truck applications.
Q: What maintenance is required for the CR 60021-8?
A: Inspect the CR 60021-8 during routine equipment maintenance. Check that threads are intact and the nut tightens securely. Replace if threads are damaged, stripped, or if the nut no longer holds tension on the mating bolt. Grade 5 steel fasteners typically have a long operational life in warehouse environments.