Value Collection D39505 Hex Head Cap Screw 7/8-14 X 6 in Grade 8

Product Description

The VALUE COLLECTION D39505 is a partially threaded hex head cap screw designed for high-strength fastening applications. It features a 7/8-14 thread size in the Unified Fine (UNF) standard and measures 6 inches under the head. Manufactured from Grade 8 steel, this screw meets the mechanical requirements of ASME B18.2.1 and SAE J429, making it appropriate for demanding structural and mechanical assemblies. The zinc yellow dichromate finish provides a baseline level of corrosion resistance. Partial threading along the shank allows for clamping force between joined materials without thread engagement through the full grip length. Installation is performed by mechanics, millwrights, and maintenance technicians working on heavy equipment, tooling fixtures, or structural steel assemblies.

This cap screw is suited for industrial and commercial applications where high-strength, inch-series fasteners are required. The 7/8-14 UNF thread pitch is a fine-thread configuration, preferred in applications where vibration resistance and precise torque control are important. Typical use cases include machinery assembly, heavy equipment repair, and structural connections. The 6-inch shank length accommodates thick material stacks or applications requiring extended grip length. This screw is sold individually with a minimum order quantity of 10 units.

Key Features

• Grade 8 steel construction meets ASME B18.2.1 and SAE J429 mechanical standards
• 7/8-14 UNF fine-thread configuration for improved vibration resistance
• Partially threaded shank provides full clamping force across the grip length
• Zinc yellow dichromate finish for baseline corrosion protection
• 6-inch length under head accommodates thick material stacks and extended grip applications

Compatibility

Designed as a standard inch-series Grade 8 hex head cap screw for use with 7/8-14 UNF threaded nuts, inserts, or tapped holes in industrial machinery, structural steel, and heavy equipment assemblies.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or maintenance technician following applicable torque specifications for Grade 8 fasteners in the relevant equipment service documentation. Always verify thread engagement depth and mating hardware rating before final assembly. Inspect mating threads for damage or contamination before installation. Use appropriate hand tools or impact equipment rated for 7/8-inch drive fasteners.