Bowmalloy 36111 Hex Head Cap Screw 1/2-13 X 2-3/4 in Grade 9

Product Description

The BOWMALLOY 36111 is a partially threaded hex head cap screw designed for high-strength fastening applications in mechanical, structural, and industrial assemblies. Manufactured from Grade 9 alloy steel, this fastener delivers superior tensile strength compared to standard Grade 5 or Grade 8 hardware. The clear zinc chromate finish provides corrosion resistance in demanding environments. Sized at 1/2-13 thread with a 2-3/4 inch length under the head, it is a common choice for maintenance mechanics, millwrights, and industrial contractors working on heavy equipment and structural connections.

This cap screw is suited for industrial and commercial applications where high-clamp-load fastening is required. Partial threading allows for precise shank engagement in clearance holes, making it appropriate for bolted joint assemblies in machinery, fabricated steel structures, and equipment mounting. The inch-series 1/2-13 thread pitch is standard across a wide range of ANSI-dimensioned hardware assemblies in North American trade applications.

Key Features

• Grade 9 alloy steel construction for high tensile strength beyond standard Grade 8 fasteners
• Partially threaded shank for accurate shank-to-hole fit in clearance applications
• Clear zinc chromate finish for corrosion and oxidation resistance
• 1/2-13 UNC thread size in the standard inch measurement system
• 2-3/4 inch length under head suits medium-depth bolted joint applications

Compatibility

Designed as a standard inch-series hex head cap screw for use in any assembly requiring a 1/2-13 UNC partially threaded fastener per ANSI dimensional standards.

Installation Notes

Installation is performed by licensed mechanics or qualified tradespeople using a standard hex wrench or socket set sized for a 1/2-13 UNC hex head fastener. Always verify hole clearance and thread engagement depth before torquing. Follow the applicable fastener torque specification tables for Grade 9 alloy steel as published by the fastener manufacturer or relevant industry standards. Inspect the zinc chromate finish for damage before installation in corrosive environments.