Bowmalloy BOWMP36042 Hex Head Cap Screw 5/16-18 X 5 in

Product Description

The BOWMALLOY BOWMP36042 is a Grade 9 steel hex head cap screw with a 5/16-18 thread size and a 5-inch length under head. It features partial threading and a Bowma-Guard finish, which provides corrosion resistance for demanding industrial and trade applications. This fastener is sized for use where high-strength steel hardware is required and is sold in packages of 25. Licensed contractors, maintenance technicians, and industrial tradespeople working with structural assemblies or mechanical equipment select this screw when Grade 9 strength and a protective coating are job requirements.

This hex head cap screw is suited for heavy-duty fastening applications across commercial, industrial, and trade settings. The partial threading design makes it appropriate for clamping two surfaces together where a fully threaded shank could cause binding in the grip area. The 5/16-18 coarse thread pitch is widely used in general mechanical assembly, bracket mounting, and equipment installation where standard inch-series fasteners are specified.

Key Features

• Grade 9 steel construction provides high tensile and proof load strength
• Bowma-Guard finish delivers corrosion protection in exposed or harsh environments
• Partial threading allows for clean clamping without binding in the unthreaded shank area
• 5/16-18 coarse thread (UNC) is compatible with standard inch-series nuts and tapped holes
• 5-inch length under head accommodates deeper clamping applications
• Packaged in quantities of 25 to support job-site and shop use

Compatibility

Designed as an OEM-style and general-use replacement or new-installation hex head cap screw for applications requiring a 5/16-18 coarse-thread, Grade 9 steel fastener with a 5-inch length under head.

Installation Notes

Installation should be performed by qualified tradespeople following applicable mechanical and structural codes. Use a properly sized hex head wrench or socket to drive the fastener and avoid overtightening, which can stretch or shear Grade 9 hardware. Ensure the mating nut or tapped hole is rated for the fastener grade to maintain the intended clamp load. Inspect the Bowma-Guard finish prior to installation and discard any fasteners showing coating damage that could compromise corrosion resistance.