Bowmalloy BOWMP36331 Hex Head Cap Screw 5/16-24 1-1/2 in

Product Description

The BOWMALLOY BOWMP36331 is a Grade 9 steel hex head cap screw with a 5/16-24 unified fine thread and a 1-1/2 inch length under head. It features partial threading and a Bowma-Guard protective finish designed to resist corrosion in demanding service environments. This fastener is suited for high-strength bolted joint applications where fine-thread engagement and superior tensile properties are required. Installation is performed by mechanics, millwrights, and field service technicians working on mechanical assemblies, equipment frames, and structural connections that call for Grade 9 rated hardware.

This screw is appropriate for use in industrial, agricultural, and heavy equipment applications where a fine-thread, high-strength fastener is specified. The 5/16-24 thread pitch provides increased thread engagement compared to coarse-thread equivalents, making it well suited for hard materials and applications subject to vibration. The partial threading leaves a smooth shank section beneath the head, which is beneficial when fastening through clearance holes or where shear loads are a consideration.

Key Features

• Grade 9 steel construction provides high tensile and proof load ratings above standard Grade 5 and Grade 8 fasteners
• 5/16-24 unified fine thread (UNF) for increased holding strength and reduced loosening under vibration
• Partial threading retains a full-diameter shank for shear resistance and accurate hole alignment
• Bowma-Guard finish delivers corrosion protection for outdoor and harsh-environment installations
• Hex head drive for use with standard combination wrenches and hex sockets
• Sold in a package quantity of 50 units per order

Compatibility

Designed as a high-strength replacement or service fastener for bolted assemblies specifying a 5/16-24 UNF hex head cap screw in Grade 9 steel with partial threading.

Installation Notes

Installation should be performed by qualified mechanics or millwrights familiar with high-strength fastener procedures. De-energize and lock out any equipment before accessing fastener locations on powered machinery. Use a calibrated torque wrench and follow the torque specifications provided in the equipment manufacturer's service documentation for Grade 9 fasteners of this diameter and thread pitch. Do not substitute this fastener into applications that specify a different grade, thread form, or finish without engineering review.