Value Collection 451654BR Hex Head Cap Screw Grade 8 Steel

Product Description

The VALUE COLLECTION 451654BR is a Grade 8 steel hex head cap screw designed for high-strength bolted connections in demanding industrial and mechanical applications. With a 1-3/8-6 UNC thread size and a 5-1/2-inch length under head, this partially threaded fastener meets ASME B18.2.1 dimensional standards. The bright, uncoated finish indicates bare steel without additional plating or coating treatment. Grade 8 classification means the screw meets elevated proof load, tensile strength, and hardness requirements, making it appropriate for structural, heavy equipment, and high-load assembly work.

This cap screw is used in industrial machinery, structural steel assemblies, heavy equipment fabrication, and maintenance applications where a large-diameter, high-strength fastener is required. The partially threaded shank is suited to bolted joints where a smooth shank section through the grip area is preferred for shear resistance or precise fit. Typically installed by millwrights, industrial mechanics, or field maintenance technicians working on equipment requiring heavy-duty fastening.

Key Features

• Grade 8 steel construction meets elevated tensile and proof load requirements
• 1-3/8-6 UNC thread size for large-diameter, high-load applications
• Partially threaded shank provides a smooth grip section for shear-loaded joints
• Conforms to ASME B18.2.1 dimensional standards for hex head cap screws
• Bright, uncoated finish — no plating or coating applied
• 2-1/16-inch hex key size for standard wrench drive

Compatibility

Designed as a standard ASME B18.2.1 hex head cap screw for use in applications requiring a 1-3/8-6 UNC Grade 8 partially threaded fastener with a 5-1/2-inch length under head.

Installation Notes

Installation requires a 2-1/16-inch open-end, box, or socket wrench. Always verify that the mating nut and tapped hole thread specification matches 1-3/8-6 UNC before assembly. De-energize, depressurize, or otherwise isolate the equipment being serviced prior to fastener replacement. Follow applicable industry torque guidelines for Grade 8 fasteners at this diameter, sourced from the equipment manufacturer or a current fastener engineering reference.