Value Collection HCI50870450G Hex Head Cap Screw 7/8-9

Product Description

The VALUE COLLECTION HCI50870450G is a partially threaded hex head cap screw sized 7/8-9 (UNC thread) with a 4-1/2 inch length under head. Manufactured from Grade 5 steel and finished with a hot-dipped galvanized coating, this fastener is built for structural and mechanical applications where corrosion resistance and tensile strength are required. The hot-dipped galvanized finish provides a thick zinc layer that outperforms electroplated alternatives in outdoor and high-moisture environments. At 0.93 pounds, it is a heavy-duty fastener suited for bolted connections in equipment, framing, and mechanical assemblies. Installation requires a standard hex wrench or impact driver with the correct 7/8 inch drive socket.

This hex head cap screw is commonly used in commercial and industrial construction, HVAC equipment mounting, structural steel connections, heavy equipment assemblies, and utility installations. The partial thread shank provides a bearing surface that resists shear loads in bolted joint applications. Trades including HVAC installers, pipefitters, electricians, and general contractors use this style of fastener when securing equipment bases, unistrut assemblies, pipe hangers, and structural members to concrete or steel substrates.

Key Features

• Grade 5 steel construction meets SAE J429 tensile strength requirements for medium-strength fastener applications
• Hot-dipped galvanized finish delivers superior corrosion resistance compared to electroplated zinc coatings
• Partial thread shank improves shear resistance in structural bolted connections
• UNC (Unified National Coarse) 7/8-9 thread pattern for broad nut and insert compatibility
• Hex head drive style compatible with standard wrenches and impact sockets

Compatibility

Designed as a standard inch-series UNC hex head cap screw suitable for use with 7/8-9 hex nuts, flat washers, and lock washers in structural, mechanical, and equipment mounting applications.

Installation Notes

Installation should be performed by qualified tradespeople following applicable mechanical and structural codes. Use the correct 7/8 inch hex socket or wrench and apply thread lubricant or anti-seize compound as required by the application. Ensure mating nuts and hardware are also galvanized or zinc-plated to avoid galvanic compatibility issues. Inspect threads for damage before installation and do not install in place of Grade 8 fasteners where higher tensile strength is specified.