Value Collection 97451 Hex Head Cap Screw 5/8-18 Grade 5 25 Pack

Product Description

The VALUE COLLECTION 97451 is a hex head cap screw manufactured from Grade 5 steel in an uncoated finish. With a 5/8-18 UNF thread and a 2.5-inch length under head, this fastener is partially threaded and conforms to ASME B18.2.1 dimensional standards. It is used in mechanical assemblies, structural connections, and equipment fabrication where a fine-thread, medium-strength hex fastener is required. Sold in a 25-piece package, the 97451 suits maintenance shops, field service kits, and production lines that need reliable Grade 5 hardware on hand.

This screw is appropriate for a wide range of industrial, commercial, and trade applications. Fine-thread 5/8-18 fasteners are commonly used in HVAC equipment frames, pump assemblies, compressor mounts, and similar mechanical systems where vibration resistance or closer thread engagement is needed compared to coarse-thread alternatives. The partial threading allows the unthreaded shank to bear shear loads in close-tolerance holes, making it suitable for bolted joint designs that rely on shank-bearing rather than full thread engagement throughout the grip length.

Key Features

• 5/8-18 UNF fine-thread profile for improved vibration resistance and tighter thread engagement
• 2.5-inch length under head, partially threaded for shear-load-bearing applications
• Grade 5 steel construction meets medium-strength fastener requirements
• Uncoated finish; compatible with field-applied coatings or lubricants as needed
• Conforms to ASME B18.2.1 dimensional standard
• Sold in a 25-piece package with a minimum order quantity of 1

Compatibility

Designed as a standard 5/8-18 UNF hex head cap screw per ASME B18.2.1, suitable for use in any application calling for a Grade 5 partially threaded hex fastener in that thread size and length.

Installation Notes

Installation should be performed by a qualified mechanic or technician using an appropriately sized hex wrench or socket. De-energize and lock out any equipment before replacing fasteners on live machinery. Do not substitute a coarse-thread nut or tapped hole for this fine-thread fastener, as thread engagement and torque values will differ. Follow the equipment manufacturer's torque specifications and applicable codes for the assembly being serviced.