Bowmalloy 36331 Hex Head Cap Screw 5/16-24 Grade 9

Product Description

The BOWMALLOY 36331 is a Grade 9 alloy steel hex head cap screw with a 5/16-24 thread size and a 1-1/2-inch length under the head. Finished in clear zinc chromate, it delivers corrosion resistance suited to demanding mechanical and structural fastening applications. The screw is partially threaded, providing stronger clamping force in bolted joint assemblies where the shank bears load. Weighing 0.01 pounds, this fastener is built to Inch system dimensional standards and is sold in quantities of 100 per package. Licensed mechanics, millwrights, HVAC technicians, and plumbers commonly use Grade 9 cap screws where high-strength fastening is required.

This hex head cap screw is used in residential and commercial mechanical installations where a high-strength, fine-thread fastener is required. Fine-thread 5/16-24 screws are common in assemblies requiring precise torque control and vibration resistance, including equipment mounting, bracket attachment, and unit component fastening in HVAC, plumbing, and general mechanical systems. The clear zinc chromate finish provides a base level of corrosion protection for indoor and light-duty outdoor use.

Key Features

• Grade 9 alloy steel construction for high tensile strength in demanding fastening applications
• 5/16-24 fine thread provides enhanced vibration resistance and precise torque control
• Partially threaded shank improves clamping performance in bolted joint assemblies
• Clear zinc chromate finish offers corrosion protection for mechanical environments
• Inch system dimensioning for compatibility with standard SAE tooling
• Sold in 100-piece packages to support job-lot procurement

Compatibility

Designed as a standard Inch-system hex head cap screw for use in mechanical, HVAC, plumbing, and structural assemblies requiring a 5/16-24 fine-thread Grade 9 fastener.

Installation Notes

Installation should be performed by a qualified mechanic or trade professional using a properly sized hex wrench or socket. Power down or de-energize any associated equipment before disassembly or fastener replacement. Apply thread engagement and torque values per the equipment manufacturer's specifications or applicable standards. Do not substitute a lower-grade fastener in any application that specifies Grade 9 minimum.