Value Collection 451653BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451653BR is a Grade 8 steel hex head cap screw engineered for high-strength bolted connections in demanding industrial and mechanical applications. With a 1-3/8-6 UNC thread size, a 5-inch length under head, and a bright uncoated finish, this fastener meets the dimensional and mechanical requirements of ASME B18.2.1. The partial thread design concentrates clamping load in the shank, making it well suited for joints where shear resistance and tensile strength are critical. Installation is performed with a 2-1/16-inch hex key or matching drive socket. This screw weighs approximately 2.79 pounds and is sold individually.

This cap screw is used across a wide range of industrial, structural, and mechanical assembly applications where Grade 8 strength is specified. Typical install scenarios include heavy equipment fabrication, structural steel connections, agricultural machinery, and general manufacturing. The UNC thread form is compatible with standard inch-series nuts and tapped holes. Partial threading is standard practice for bolted joints requiring precise shank-to-hole fit or where the bolt spans an unthreaded joint interface.

Key Features

• Grade 8 steel construction delivers high tensile and proof load strength for demanding fastener applications
• 1-3/8-6 UNC partial thread conforms to ASME B18.2.1 dimensional standards
• Partially threaded shank provides superior shear resistance across joint interfaces
• Bright uncoated finish — suitable for applications where additional coating or plating will be applied by the end user
• 2-1/16-inch hex drive for use with standard hex sockets or open-end wrenches
• Sold as a single unit with a minimum order quantity of 1

Compatibility

Designed for use with standard inch-series Grade 8 or equivalent hex nuts and tapped holes following UNC thread standards in heavy-duty mechanical and structural assemblies.

Installation Notes

Installation is typically performed by millwrights, ironworkers, or mechanical assemblers using a 2-1/16-inch socket or open-end wrench. Always verify that mating nut grade and thread class are compatible with a Grade 8 fastener before assembly. Consult applicable structural or mechanical codes for proper torque specifications, as required values vary by joint design, lubrication condition, and engineer specification. Inspect threads for damage before installation and ensure the joint surfaces are clean and properly aligned.