Bowmalloy BOW36301 Hex Head Cap Screw 1/4-28 X 5/8 in

Product Description

The BOWMALLOY BOW36301 is a fully threaded hex head cap screw designed for high-strength fastening applications in mechanical, structural, and equipment assembly work. Built to Grade 9 steel specifications, it delivers greater tensile strength than the more common Grade 5 or Grade 8 fasteners, making it a reliable choice where load-bearing performance matters. The screw measures 1/4-28 thread size with a 5/8-inch length under head and is finished with Bowmalloy's Bowma-Guard zinc-plated clear chromate coating to resist corrosion in service environments. Full threading runs the entire length of the shank, providing maximum thread engagement in shallow or through-hole applications.

This cap screw is suited for use in precision mechanical assemblies, HVAC equipment mounting, electrical enclosure hardware, and general trade applications where a fine-thread, high-strength fastener is required. The 1/4-28 fine thread pitch offers better vibration resistance and finer adjustment than coarse-thread equivalents, making it a common choice in applications subject to dynamic loads or frequent disassembly. It is sold in packages of 100 units, making it practical for service trucks, shop stock, or job-site replenishment.

Key Features

• Grade 9 steel construction exceeds typical Grade 5 and Grade 8 strength ratings
• Bowma-Guard zinc-plated clear chromate finish for corrosion resistance
• Fully threaded shank for maximum thread engagement
• 1/4-28 fine thread pitch improves vibration resistance over coarse-thread alternatives
• 5/8-inch length under head suits shallow fastening and tight clearance applications
• Packaged in quantities of 100 for bench stock and service inventory use

Compatibility

Designed as a standard inch-series hex head cap screw for use in any application requiring a 1/4-28 fine thread fastener with a 5/8-inch grip length in Grade 9 steel.

Installation Notes

Installation is performed with a standard hex head wrench or socket driver sized for a 1/4-inch hex cap screw. Always de-energize and lock out equipment before accessing fastener locations on powered machinery. Do not mix thread classes or attempt to drive a fine-thread fastener into a coarse-thread tapped hole. Follow applicable equipment manufacturer torque specifications and relevant codes such as ASME or equipment-specific service manuals.