Value Collection C50000159 Hex Head Cap Screw Grade 8

Product Description

The VALUE COLLECTION C50000159 is a heavy-duty hex head cap screw designed for high-strength fastening in structural and mechanical assemblies. Manufactured from Grade 8 steel in an uncoated finish, this fastener delivers the tensile strength required for demanding industrial and construction applications. The screw features a 1-1/2-6 UNC thread and measures 8 inches in length under the head, with partial threading along the shank. It conforms to ASME B18.2.1 dimensional standards, ensuring reliable fitment with standard hardware and tooling used by trade professionals across multiple industries.

This cap screw is suited for heavy mechanical assemblies, structural steel connections, equipment mounting, and industrial fabrication work where high-strength Grade 8 fasteners are specified. Partial threading is appropriate for applications requiring a smooth shank grip zone to carry shear loads or provide precise clamping without thread engagement across the full bolt length. Machinists, millwrights, ironworkers, pipefitters, and general mechanical contractors routinely specify this fastener class in both residential and commercial construction and maintenance projects.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 1-1/2-6 UNC thread form for compatibility with standard inch-series nuts and tapped holes
• 8-inch length under head accommodates thick structural members and stacked assemblies
• Partially threaded shank provides a smooth grip zone for shear-load and precise clamping applications
• Uncoated finish maintains dimensional precision without coating buildup on thread flanks
• Conforms to ASME B18.2.1 for dimensional consistency and interchangeability

Compatibility

Designed as an OEM-style and general-use replacement hex head cap screw for structural and mechanical fastening applications requiring a 1-1/2-6 UNC thread, Grade 8 steel, and an 8-inch length under head per ASME B18.2.1 specifications.

Installation Notes

Installation should be performed by qualified tradespeople using calibrated torque equipment appropriate for Grade 8 fasteners of this diameter. Always consult the relevant structural or equipment specification for the required torque value, as this varies by application and joint design. Inspect mating threads and bearing surfaces for damage or contamination before assembly. Never substitute a lower-grade fastener in an application specifying Grade 8.