Value Collection HCI51120450G-001BX Hex Head Cap Screw

Product Description

The VALUE COLLECTION HCI51120450G-001BX is a partially threaded hex head cap screw designed for heavy-duty fastening applications in structural, mechanical, and industrial assemblies. It carries a 1-1/8-7 UNC thread size with a 4-1/2 inch length under head, manufactured from Grade 5 steel and finished with a hot-dipped galvanized coating for corrosion resistance. Partial threading allows the unthreaded shank to bear shear loads in bolted connections, making it well suited for applications where clamping strength and lateral load resistance matter. At 1.61 pounds, this is a substantial fastener appropriate for commercial construction, equipment mounting, and structural framing.

This cap screw is used in applications requiring a large-diameter, heavy-duty UNC fastener with a corrosion-resistant finish. Typical install scenarios include outdoor structural steel connections, heavy equipment frames, utility infrastructure mounting, and industrial fabrication. The hot-dipped galvanized finish provides meaningful protection in wet or exposed environments. Tradespeople and fabricators working with steel structures, mechanical supports, and equipment bases will find this fastener sized for high-load connections where standard smaller fasteners are inadequate.

Key Features

• 1-1/8-7 UNC thread form provides coarse-pitch engagement suitable for heavy structural use
• Partially threaded shank handles shear loads without thread interference in the bearing zone
• Grade 5 steel construction meets medium-strength fastener requirements for structural and mechanical assemblies
• Hot-dipped galvanized finish delivers corrosion protection for outdoor and exposed installations
• 4-1/2 inch length under head accommodates thick material stacks or long grip lengths

Compatibility

Designed as a standard UNC hex head cap screw for use with 1-1/8-7 threaded nuts, inserts, and tapped holes in steel structural and mechanical assemblies wherever a Grade 5, hot-dipped galvanized fastener is specified.

Installation Notes

Installation is performed by qualified tradespeople including ironworkers, millwrights, and structural mechanics. Always power down or de-energize adjacent equipment before fastener installation in mechanical assemblies. Use a properly sized impact wrench or hand torque wrench rated for large-diameter fasteners, and follow the applicable fastener torque specification from the engineering drawings or relevant structural code. Inspect the galvanized coating for damage before installation and replace any fasteners with compromised coatings in corrosive service environments.