Bowmalloy 36114 Hex Head Cap Screw 1/2-13 X 3-1/2 in Grade 9

Product Description

The BOWMALLOY 36114 is a Grade 9 alloy steel hex head cap screw sized at 1/2-13 thread by 3-1/2 inches under the head, finished in zinc-plated clear chromate for corrosion resistance. This is a partially threaded fastener intended for high-strength bolted connections in structural, mechanical, and industrial assemblies. Grade 9 alloy steel provides higher tensile strength than the more common Grade 5 or Grade 8 hardware, making it a fit for demanding applications where fastener failure is not acceptable. The clear chromate zinc plating adds a baseline layer of corrosion protection while maintaining a clean, low-profile appearance. Licensed tradespeople and industrial maintenance personnel are the primary installers.

This cap screw is suited for heavy-duty bolted joint applications across commercial, industrial, and trade settings. Typical use cases include equipment mounting, structural framing connections, machinery assembly, and mechanical system fabrication where high-clamp-load fasteners are specified. The 1/2-13 Unified National Coarse (UNC) thread form is one of the most widely used inch-series thread standards, compatible with standard 1/2-13 hex nuts and threaded holes machined to that specification. The partial threading allows the unthreaded shank to seat cleanly in clearance holes, distributing shear loads across the bolt body.

Key Features

• Grade 9 alloy steel construction for high tensile strength beyond Grade 8 specifications
• 1/2-13 UNC thread, a widely standardized inch-series coarse thread
• 3-1/2 inch length under head for deep bolted joint engagement
• Partially threaded shank for improved shear load distribution
• Zinc-plated clear chromate finish for baseline corrosion resistance

Compatibility

Designed for use with standard 1/2-13 hex nuts, washers, and threaded components machined to UNC inch-series specifications in structural and mechanical assemblies.

Installation Notes

Installation of high-strength fasteners should be performed by qualified mechanical or maintenance trade personnel familiar with proper bolted joint procedures. Always de-energize or shut down the equipment being serviced before fastener installation or removal. Use a calibrated torque wrench and follow the joint designer's torque specifications for Grade 9 hardware, as improper torque can compromise clamp load and joint integrity. Consult applicable codes and standards, such as ASME or AISC guidelines, when fasteners are used in structural or pressure-retaining applications.