Value Collection HCI50870500G Hex Head Cap Screw 7/8-9x5

Product Description

The VALUE COLLECTION HCI50870500G is a partially threaded hex head cap screw sized at 7/8-9 x 5 inches, manufactured from Grade 5 steel with a hot-dipped galvanized finish. The 7/8-9 designation refers to a 7/8-inch nominal diameter with 9 threads per inch, following the Unified National Coarse (UNC) thread standard. The hot-dipped galvanized coating provides corrosion resistance for outdoor, structural, and industrial applications. Partial threading along the shank is standard for applications requiring a smooth bearing surface between clamped materials. This fastener is used by ironworkers, millwrights, structural steel crews, mechanical contractors, and general tradespeople across a wide range of assembly and installation tasks.

This cap screw is suited for structural connections, equipment mounting, and general mechanical assemblies where Grade 5 tensile strength and corrosion protection are required. The hot-dipped galvanized finish makes it appropriate for exterior installations, treated lumber contact, and corrosive environments where zinc-plated hardware would offer insufficient protection. The 5-inch length under head accommodates thick stack-ups common in steel fabrication, framing hardware, and heavy equipment mounting brackets.

Key Features

• 7/8-9 UNC thread form for compatibility with standard Grade 5 nuts and threaded fastener hardware
• Grade 5 steel construction provides medium-strength tensile performance for structural and mechanical use
• Hot-dipped galvanized finish delivers superior corrosion resistance compared to electroplated zinc coatings
• Partial threading preserves a smooth shank section for load-bearing and shear applications
• 5-inch length under head accommodates thick material stack-ups and structural assemblies

Compatibility

Designed for use with standard 7/8-9 UNC hex nuts, flat washers, and lock washers in inch-series fastener assemblies. Suitable for general structural and mechanical installations requiring Grade 5 hardware.

Installation Notes

Installation is typically performed by ironworkers, millwrights, or mechanical contractors using a standard 1-3/8-inch hex wrench or impact socket. Always match the nut grade to the bolt grade to achieve the rated joint strength. For structural connections, consult applicable building codes and engineering specifications for required torque values before installation. Inspect the galvanized coating for damage prior to installation in corrosive or outdoor environments.