Value Collection HCI51000450G-010BX Hex Head Cap Screw

Product Description

The VALUE COLLECTION HCI51000450G-010BX is a partially threaded hex head cap screw designed for heavy-duty fastening applications in structural, mechanical, and industrial assembly work. Built from Grade 5 steel with a hot-dipped galvanized finish, this fastener delivers solid shear and tensile strength alongside corrosion resistance suited to outdoor and high-moisture environments. The screw measures 1-8 thread size by 4-1/2 inches under the head and follows the UNC thread standard. Machinists, ironworkers, millwrights, and general contractors reach for Grade 5 galvanized hardware when a job calls for reliable clamping force and weather durability without stepping up to alloy-grade cost.

This fastener is appropriate for structural bolting, equipment mounting, framing connections, and general fabrication where a coarse UNC thread and partial threading are specified. The partial thread design allows the unthreaded shank to bear shear loads cleanly, making this cap screw a common choice in bolted connections that see lateral stress. It is sold individually and suits both shop and field installation by trade professionals working to standard fastener specifications.

Key Features

• Grade 5 steel construction for high tensile and proof-load strength
• Hot-dipped galvanized finish provides corrosion resistance in outdoor and wet environments
• Partially threaded shank handles shear loads at bolted joints
• UNC (Unified National Coarse) thread standard for broad nut and insert compatibility
• 1-8 thread size x 4-1/2 inches under head — inch measurement system
• Sold as a single unit with no minimum bundle requirement

Compatibility

Designed for use with standard UNC hex nuts, washers, and threaded inserts in the 1-inch coarse thread series. Fits applications calling for a 1-8 UNC partially threaded hex cap screw per ASME B18.2.1 dimensional standards.

Installation Notes

Installation should be performed by a qualified tradesperson using a calibrated torque wrench sized for a 1-inch fastener. Always verify that mating threads and bearing surfaces are clean and free of debris before assembly. Follow applicable structural or mechanical codes for torque specifications, as required torque values vary by joint design and load requirements. Do not substitute this fastener in applications requiring Grade 8 or higher alloy hardware without engineering review.