Value Collection 451657BR Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION 451657BR is a heavy-duty hex head cap screw engineered for high-strength fastening applications. With a thread size of 1-3/8-6 UNC and a length under head of 8 inches, this fastener is partially threaded to allow for precise clamping force in structural and mechanical assemblies. It is manufactured from Grade 8 steel with a bright, uncoated finish, meeting ASME B18.2.1 dimensional standards. Machinists, millwrights, ironworkers, and general contractors use fasteners of this class in heavy equipment, structural steel connections, and industrial machinery installations.

This cap screw is suited for use in high-load bolted joints where Grade 8 strength requirements are specified by engineering drawings or project specifications. The partial threading makes it appropriate for applications where an unthreaded shank in the grip area is needed to resist shear forces. Typical install scenarios include heavy-duty machinery bases, structural steel assemblies, and large-diameter flange connections in industrial and commercial construction environments.

Key Features

• Grade 8 steel construction for high tensile and proof load capacity
• 1-3/8-6 UNC thread form for compatibility with standard inch-series heavy hex nuts
• Partial threading preserves an unthreaded shank for shear-resistant bolted joints
• Bright, uncoated finish maintains dimensional precision per ASME B18.2.1
• 2-1/16 inch hex key drive size suits standard heavy-duty impact and torque wrenches
• ASME B18.2.1 compliance ensures standardized dimensions for interchangeable fit

Compatibility

Designed as a standard inch-series hex head cap screw for use with 1-3/8-6 UNC heavy hex nuts and washers in structural, industrial, and mechanical bolted assemblies requiring Grade 8 fastener specifications.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or ironworker using calibrated torque equipment rated for Grade 8 fasteners of this diameter. De-energize and lock out all equipment before disassembly or fastener replacement in machinery applications. Reference applicable structural or mechanical engineering specifications for required torque values, as none are supplied with this component. Ensure mating threads and bearing surfaces are clean and free of debris before installation.