Value Collection 872457BR Hex Socket Cap Screw 5/8-18 Unf

Product Description

The VALUE COLLECTION 872457BR is a hex socket cap screw designed for high-strength fastening applications in mechanical assembly, maintenance, and fabrication work. This partially threaded fastener features a 5/8-18 UNF thread size and measures 2.5 inches in length under the head. It is driven with a 1/2-inch hex key, providing precise torque application in confined or recessed mounting locations. Constructed from alloy steel with a zinc-plated finish, the 872457BR resists corrosion while maintaining the mechanical strength expected in structural and machine fastening applications. This screw conforms to ASME B18.8 and ASTM A574 standards.

This screw is suited for industrial equipment assembly, machine tool applications, jigs and fixtures, and general mechanical maintenance where a recessed drive and strong clamping force are required. The fine 18-threads-per-inch UNF pitch provides greater holding strength and finer adjustment compared to coarse thread equivalents, making it well-suited for applications with thinner material sections or where vibration resistance is a priority. Licensed mechanics, millwrights, maintenance technicians, and fabricators are the typical installers.

Key Features

• 5/8-18 UNF fine thread for superior holding strength and vibration resistance
• 2.5-inch length under head with partial threading for secure clamping against unthreaded bores
• 1/2-inch hex socket drive allows precise torque application in tight spaces
• Alloy steel construction meets ASTM A574 mechanical requirements
• Zinc-plated finish provides corrosion resistance for indoor and light-duty environments
• Conforms to ASME B18.8 dimensional standards for consistent fitment

Compatibility

Designed as a standard ASME B18.8 and ASTM A574 compliant hex socket cap screw for use in any application requiring a 5/8-18 UNF partially threaded fastener with a 1/2-inch hex drive.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician using a calibrated 1/2-inch hex key or Allen driver. Always verify that the mating threaded hole is clean and properly tapped to 5/8-18 UNF specification before installing. De-energize and lock out any equipment before performing fastener installation or replacement on powered machinery. Do not use impact tools unless the application and torque requirements have been confirmed for this fastener grade.