Bowmalloy BOW36339 Hex Head Cap Screw 5/16-24 X 3.5 in Grade 9

Product Description

The BOWMALLOY BOW36339 is a Grade 9 steel hex head cap screw with a 5/16-24 thread size and a 3.5-inch length under head. It features partial threading and a Bowma-Guard protective finish. Grade 9 fasteners deliver higher tensile strength than standard Grade 5 or Grade 8 hardware, making this screw appropriate for high-stress mechanical assemblies. The Bowma-Guard finish provides corrosion resistance for use in demanding service environments. Installation is performed with standard hex-drive tooling. This fastener is sold in quantities of 50 per package.

This hex head cap screw is suited for use in heavy equipment, industrial machinery, agricultural implements, and other applications requiring high-strength inch-series fasteners. The 5/16-24 fine thread pitch provides increased holding power and resistance to loosening under vibration compared to coarse thread equivalents. Partially threaded shanks are common in structural joint applications where a smooth shank section is needed to pass through a clearance hole before engaging a tapped bore or nut.

Key Features

• Grade 9 steel construction for high tensile strength in demanding load applications
• 5/16-24 fine thread pitch for improved vibration resistance and clamping force
• 3.5-inch length under head accommodates thicker joint stacks
• Partially threaded shank for clearance-hole pass-through in structural assemblies
• Bowma-Guard finish provides corrosion protection in harsh service conditions
• Sold in 50-piece packages for shop stock and field service use

Compatibility

Designed as a high-strength inch-series hex head cap screw for use in any application requiring a 5/16-24 partially threaded fastener with a 3.5-inch length under head and Grade 9 material specification.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician using an appropriate hex-drive socket or wrench sized for a 5/16-inch hex head fastener. Verify thread engagement depth and clearance hole dimensions before installation. Follow the equipment manufacturer's torque specifications for Grade 9 fasteners of this diameter and thread pitch. Do not substitute a lower-grade fastener in applications specified for Grade 9 hardware.