Value Collection 451146PR Hex Head Cap Screw 1/2-20 X 14 in

Product Description

The VALUE COLLECTION 451146PR is a Grade 8 steel hex head cap screw designed for high-strength fastening applications. This partially threaded fastener features a 1/2-20 UNF thread size and measures 14 inches under the head, making it well suited for long-reach bolted connections that require fine thread engagement and significant clamp load. The bright, uncoated finish exposes bare steel with no additional surface treatment. Manufactured to ASME B18.2.1 standards, this screw meets dimensional and mechanical requirements expected by trade professionals working on structural, mechanical, and industrial assemblies.

This cap screw is used in heavy-duty mechanical and structural applications where Grade 8 strength is required. Typical installations include machine frames, equipment mounting, and fabricated steel assemblies in industrial, commercial, and trade-service environments. The fine 1/2-20 UNF thread pitch provides tighter thread engagement compared to coarse thread equivalents, which is preferred in applications subject to vibration or where precise torque control is needed. The partially threaded shank provides a bearing surface through the joint material.

Key Features

• Grade 8 steel construction for high tensile and proof load strength
• 1/2-20 UNF fine thread for improved vibration resistance and torque control
• 14-inch length under head accommodates long-reach bolted joint configurations
• Partially threaded shank provides an unthreaded bearing surface through the grip length
• Bright, uncoated finish — no surface treatment that could affect dimensional tolerances
• Meets ASME B18.2.1 dimensional standards

Compatibility

Designed as a standard inch-series hex head cap screw for use with 1/2-20 UNF nuts and tapped holes in steel, fabricated, or machined assemblies requiring Grade 8 fastener strength.

Installation Notes

Installation is performed by mechanics, millwrights, or trade professionals using a 3/4-inch hex wrench or socket. Always verify mating thread class and nut or tapped-hole grade are appropriate for Grade 8 fastener loading before installation. Uncoated steel is susceptible to corrosion — evaluate environmental conditions and apply appropriate anti-seize or protective measures as required by the application. Follow applicable torque specifications from a recognized fastener standard or equipment manufacturer documentation.