Bowmalloy BOW36012 Hex Head Cap Screw 1/4-20 X 3 in Grade 9

Product Description

The BOWMALLOY BOW36012 is a 1/4-20 hex head cap screw with a 3-inch length under head, manufactured from Grade 9 steel with a Bowma-Guard zinc-plated clear chromate finish. It features partial threading, making it well suited for clamping applications where a non-threaded shank is needed for shear load or precise alignment. Grade 9 steel offers higher tensile strength than standard Grade 5 or Grade 8 fasteners, and the zinc-plated finish provides corrosion resistance in exposed or mildly humid environments. Licensed tradespeople and industrial maintenance technicians commonly specify this fastener for structural and mechanical assemblies.

This screw is designed for use in inch-measurement mechanical assemblies requiring a high-strength fastener with a 1/4-20 thread form. Typical applications include HVAC equipment mounting, electrical panel fabrication, plumbing fixture brackets, and general-purpose industrial equipment assembly. The partial threading is particularly useful in through-bolt configurations where the shank spans a joint interface. Each unit weighs approximately 0.01 pounds.

Key Features

• Grade 9 steel construction for elevated tensile strength beyond standard Grade 5 and Grade 8 specifications
• Partially threaded shank for shear load capacity and precise joint alignment
• Bowma-Guard zinc-plated clear chromate finish resists corrosion in mildly humid or outdoor-adjacent installations
• 1/4-20 inch thread size with 3-inch length under head for deep-reach fastening
• UNSPSC Code 31161501 for procurement system compatibility

Compatibility

Designed for use in standard inch-series mechanical assemblies requiring a 1/4-20 thread form hex head cap screw with partial threading and Grade 9 strength rating.

Installation Notes

Installation should be performed by qualified mechanical or maintenance technicians following applicable torque guidelines for 1/4-20 Grade 9 fasteners per the relevant equipment service documentation. Always de-energize and lock out equipment before installing or removing fasteners in electrical or mechanical panels. Use calibrated torque tooling appropriate for the joint material to avoid over-torquing. Do not mix this fastener with metric or lower-grade hardware in the same joint.