Value Collection 99163 Hex Head Cap Screw 5/8-11 X 7 in Grade 8

Product Description

The VALUE COLLECTION 99163 is a Grade 8 steel hex head cap screw sized 5/8-11 x 7 inches, designed for high-strength fastening applications in mechanical, structural, and industrial assemblies. The partially threaded shank provides a smooth bearing surface through the joint, while the coarse UNC thread pattern seats securely in standard tapped holes or nuts. Manufactured to ASME B18.2.1 dimensional standards, this fastener delivers consistent head geometry and thread form for reliable torque and clamp load. The bright uncoated finish is suited for applications where surface treatments are applied post-installation or where base metal contact is preferred.

This cap screw is commonly used in heavy-duty mechanical assemblies, structural steel connections, agricultural equipment, mining machinery, and general industrial fabrication where high tensile and proof strength are required. The 5/8-11 UNC thread size is a standard coarse-pitch designation widely encountered in American mechanical systems. The 7-inch length under head accommodates thick stack assemblies or applications requiring extended grip length. Machinists, millwrights, and maintenance technicians are the typical installers for fasteners of this specification.

Key Features

• Grade 8 steel construction provides high tensile strength for demanding load-bearing applications
• Partially threaded shank maintains shank bearing surface through the joint for improved shear resistance
• 5/8-11 UNC coarse thread standard ensures broad compatibility with American-standard hardware
• 7-inch length under head suits thick material stacks and extended grip applications
• Bright uncoated finish leaves base steel exposed for post-installation coating or bare metal contact
• Manufactured to ASME B18.2.1 for consistent head dimensions and thread tolerances

Compatibility

Designed for use with standard 5/8-11 UNC hex nuts, washers, and tapped holes conforming to American inch-series fastener specifications.

Installation Notes

Installation is typically performed by machinists, millwrights, or maintenance technicians using a standard hex wrench or impact driver with the appropriate socket. Always power down or de-energize associated equipment before fastener replacement in mechanical assemblies. Use appropriate washers and torque procedures per the equipment manufacturer's specifications for Grade 8 fasteners. Inspect threads on both the screw and mating hardware for damage before installation to ensure full thread engagement.