Value Collection D30165-21/2 Hex Cap Screw 7/8-9 X 2.5 in Grade 5

Product Description

The VALUE COLLECTION D30165-21/2 is a fully threaded hex head cap screw designed for general industrial and mechanical fastening applications. It features a 7/8-9 UNC thread and a 2.5-inch length under head, manufactured from Grade 5 steel with a zinc-plated finish for basic corrosion resistance. This fastener meets ASME B18.2.1 dimensional standards, making it a reliable choice for structural and machinery assembly work where medium-strength fastening is required. Machinists, millwrights, and maintenance technicians commonly specify Grade 5 hex cap screws for bolted connections in equipment, frames, and fabricated assemblies.

This hex cap screw is suited for use in a wide range of industrial, commercial, and light structural applications. The fully threaded shank provides consistent thread engagement across the full grip length, which is advantageous when fastening thinner materials or when maximum thread contact is needed. The UNC thread form is the standard for inch-series fasteners in North American trade work and pairs with standard 7/8-9 nuts and tapped holes found throughout production and field service environments.

Key Features

• 7/8-9 UNC thread size with fully threaded shank for maximum thread engagement
• 2.5-inch length under head for medium-depth fastening applications
• Grade 5 steel construction provides medium-strength tensile performance
• Zinc-plated finish offers basic corrosion protection in dry and mildly humid environments
• Meets ASME B18.2.1 dimensional standards for consistent hex head geometry
• Inch measurement system with UNC thread standard for broad compatibility with standard tooling

Compatibility

Designed as an inch-series UNC hex head cap screw suitable for use with standard 7/8-9 nuts, washers, and tapped components in general industrial and mechanical fastening applications.

Installation Notes

Installation is performed with a standard hex socket or open-end wrench sized for a 7/8-9 hex head fastener. Always verify that mating threads and tapped holes conform to UNC specifications before assembly. Power down and de-energize any equipment before replacing or tightening fasteners in live mechanical systems. Do not exceed the rated torque range for Grade 5 fasteners as specified in applicable engineering references or OEM service documentation.