Bowmalloy BOWMP36151 Hex Cap Screw 5/8-11 X 2.5 in Grade 9

Product Description

The BOWMALLOY BOWMP36151 is a 5/8-11 hex head cap screw designed for heavy-duty fastening applications where high tensile strength and corrosion resistance are required. Built to Grade 9 steel specifications, this fastener delivers superior clamping force compared to standard Grade 5 or Grade 8 hardware. The 2.5-inch length under the head features partial threading, allowing the unthreaded shank to bear shear loads more effectively in structural and mechanical assemblies. The proprietary Bowma-Guard finish provides an added layer of corrosion protection suited for demanding environments. This fastener is installed by millwrights, maintenance mechanics, pipefitters, and general contractors in industrial and commercial settings.

This hex head cap screw is used in structural connections, mechanical equipment mounting, and heavy fabrication work where Grade 9 strength is specified. The partial threading configuration makes it well suited for through-bolting applications where the bolt passes through a clearance hole before engaging a nut or tapped bore. It is sold in packages of 10 and is appropriate for both planned maintenance and new construction work across industrial, agricultural, and commercial environments.

Key Features

• Grade 9 steel construction for high tensile strength beyond Grade 8 standards
• 5/8-11 UNC thread size with partial threading for shear-load-bearing shank
• 2.5-inch length under head for deep fastening reach
• Bowma-Guard finish for enhanced corrosion resistance
• Sold in packages of 10 to support job-site and maintenance inventory needs

Compatibility

Designed as a standard-inch hex head cap screw for use with 5/8-11 UNC nuts and tapped holes in Grade 9 or compatible high-strength fastener applications across industrial and mechanical assemblies.

Installation Notes

Installation should be performed by qualified mechanics or tradespeople familiar with high-strength fastener torque requirements per applicable standards such as ASME or ASTM specifications. Always de-energize and lock out any equipment before replacing fasteners in mechanical assemblies. Use a properly sized hex socket or open-end wrench to avoid rounding the head. Do not substitute Grade 9 fasteners with lower-grade hardware in joints where Grade 9 is specified by design.