Bowmalloy 36337 Hex Head Cap Screw 5/16-24 3 in Grade 9

Product Description

The BOWMALLOY 36337 is a Grade 9 alloy steel hex head cap screw designed for high-strength fastening applications in industrial and mechanical assemblies. It features a 5/16-24 UNF thread size and a 3-inch length under the head, with partial threading along the shank. The zinc-plated clear chromate finish provides corrosion resistance suitable for general service environments. This fastener is installed by millwrights, mechanical contractors, HVAC technicians, and other trade professionals working with precision-threaded assemblies requiring fine-thread engagement and elevated tensile strength.

This cap screw is suited for use in residential and commercial mechanical systems, machinery, equipment frames, and structural assemblies where fine-thread UNF fasteners are specified. The Grade 9 rating indicates higher proof load and tensile strength compared to Grade 5 or Grade 8 fasteners, making it appropriate for vibration-prone or high-load applications. Sold in packages of 50, it is a practical stocking item for service vans, maintenance shops, and supply rooms handling frequent fastener demand.

Key Features

• Grade 9 alloy steel construction for elevated tensile and proof load strength
• 5/16-24 UNF fine-thread specification for precise torque control and vibration resistance
• 3-inch length under head with partial threading along the shank
• Zinc-plated clear chromate finish for corrosion protection in general service conditions
• Hex head drive for standard wrench and socket installation
• Package quantity of 50 for efficient stocking and jobsite use

Compatibility

Designed as a standard UNF fine-thread hex head cap screw for use in any application specifying a 5/16-24 Grade 9 alloy steel fastener.

Installation Notes

Install using a properly sized hex wrench or socket driver. Power down or de-energize any associated equipment before accessing fastener locations on live mechanical or electrical assemblies. Follow applicable torque specifications from the equipment manufacturer or relevant codes such as ASME or industry-standard fastener guidelines. Avoid mixing Grade 9 fasteners with lower-grade nuts or tapped holes not rated for the corresponding load class.