Value Collection HCI51750800-001BX Hex Head Cap Screw

Product Description

The VALUE COLLECTION HCI51750800-001BX is a partially threaded hex head cap screw designed for heavy-duty bolted assemblies in industrial, mechanical, and structural applications. It measures 8 inches in length under the head with a 1-3/4-5 UNC (Unified National Coarse) thread form. Manufactured from Grade 5 steel with a bright, uncoated finish, this fastener delivers solid tensile strength for demanding joint applications. The partial threading allows for a smooth shank section that resists shear loading where thread engagement is not required along the full grip length. Trade professionals and industrial maintenance crews rely on this size and grade for large-bore bolted connections in equipment, machinery, and fabricated assemblies.

This hex head cap screw is suited for use in general industrial maintenance, OEM machinery assembly, structural fabrication, and heavy equipment repair. The 1-3/4-5 UNC thread and 8-inch under-head length place this fastener in applications requiring high-clamp-load connections with substantial grip lengths. It is sold individually and is appropriate wherever a large-diameter, Grade 5 partially threaded fastener is specified.

Key Features

• 1-3/4-5 UNC thread form for coarse-pitch engagement in large-bore applications
• 8-inch length under head provides extended grip for thick structural or mechanical assemblies
• Grade 5 steel construction offers reliable medium-high tensile strength
• Partial threading preserves a smooth shank section for shear-loaded joints
• Bright uncoated finish — suitable for dry indoor environments or where further coating will be applied
• Inch measurement system, compatible with standard UNC hardware specifications

Compatibility

Designed as a standard UNC inch-series hex head cap screw for use in any application specifying a 1-3/4-5 x 8-inch Grade 5 partially threaded fastener per ASME or SAE standards.

Installation Notes

Installation should be performed by a qualified mechanic, millwright, or maintenance professional familiar with large-fastener torque procedures. Always consult the applicable equipment service manual or structural specification for the required torque value before tightening — do not estimate torque on Grade 5 fasteners of this size. Use a calibrated torque wrench rated for the required torque range. Ensure mating threads are clean and free of debris before installation, and verify thread engagement depth meets the minimum required by the application design.