Bowmalloy 36340 Hex Head Cap Screw 5/16-24 X 4 in Grade 9

Product Description

The BOWMALLOY 36340 is a Grade 9 alloy steel hex head cap screw with a 5/16-24 thread size and a 4-inch length under head. It carries a zinc-plated clear chromate finish for corrosion resistance in demanding fastener applications. Partially threaded along the shank, this screw delivers high tensile strength appropriate for mechanical assemblies requiring tight, reliable clamping force. It is installed using standard hex-drive tooling and is sized to the inch measurement system. Tradespeople in HVAC, electrical, and mechanical contracting applications will find it a dependable choice for structural and equipment-mounting fastener tasks.

This fastener suits commercial and industrial mechanical assemblies, equipment mounting, and structural connections where Grade 9 alloy steel strength is required. Its 5/16-24 fine-thread profile provides precise thread engagement and resistance to loosening under vibration, making it well suited for equipment panels, brackets, and machinery frames. The clear chromate zinc plating adds a baseline level of corrosion protection for indoor and moderately exposed environments.

Key Features

• Grade 9 alloy steel construction for high tensile strength and durability
• 5/16-24 fine-thread profile resists loosening under vibration
• 4-inch length under head accommodates deeper grip and thicker material stacks
• Partial threading preserves shank strength and allows precise clamping
• Zinc-plated clear chromate finish provides corrosion resistance
• Inch measurement system sizing for compatibility with standard SAE hardware

Compatibility

Designed as a standard 5/16-24 inch-system hex head cap screw for use in mechanical, HVAC, electrical, and general industrial assembly applications requiring Grade 9 alloy steel fasteners.

Installation Notes

Installation is performed using a standard hex wrench or socket driver sized for a 5/16-24 fastener. Power down or de-energize any equipment before accessing fastener points on live assemblies. Follow applicable mechanical and structural codes for torque and fastener specification requirements. Do not mix inch-system and metric fasteners in the same threaded assembly.