Product Description
Crown OEM hex nut, part number CR 60021-31, standard #8-32 UNC thread used in electric lift truck assemblies. Manufactured from Grade A low carbon steel conforming to ASTM A563, this machine screw nut features a 0.312 inch nominal width and 0.086 inch nominal height, with a plain finish. Minimum proof load rated at 4950 psi; typical torque specification 8.5 in-lbs. No cross-reference part numbers available.
Specifications
Dimensional
| Thread Pitch | 32 threads per inch |
Material
| Material Specification | Low carbon steel per ASTM A563 |
| Steel Grade | Grade A |
| Hardness | Brinell 120 maximum |
Part Numbers
| OEM Part Number | CR 60021-31 |
Frequently Asked Questions
Q: What is the thread size and specification of the CR 60021-31?
A: The CR 60021-31 is a machine screw nut with #8-32 UNC thread. This means a number 8 screw diameter with 32 threads per inch following Unified National Coarse standard specifications.
Q: What are the physical dimensions of this nut?
A: The CR 60021-31 features a nominal width of 0.312 inches and a nominal height of 0.086 inches. The nut has a plain finish without any special coating.
Q: What material and grade is the CR 60021-31 manufactured from?
A: The CR 60021-31 is manufactured from Grade A low carbon steel conforming to ASTM A563 specification. The hardness rating is Brinell 120 maximum, ensuring consistent durability in electric lift truck assemblies.
Q: What is the load rating for the CR 60021-31?
A: The nut has a minimum proof load rating of 4950 psi. This indicates the maximum stress the fastener can withstand without permanent deformation during normal equipment operation.
Q: What torque specification should be used when fastening the CR 60021-31?
A: The typical torque specification for the CR 60021-31 is 8.5 inch-pounds. Follow Crown manufacturer guidelines and use proper torque tools to ensure consistent fastening without over-tightening.
Q: Are there cross-reference part numbers for the CR 60021-31?
A: No cross-reference part numbers are available for the CR 60021-31. This is a Crown OEM fastener with its own proprietary numbering system.