Bowmalloy BOWMP36158 Hex Head Cap Screw 5/8-11 X 4.5 in

Product Description

The BOWMALLOY BOWMP36158 is a Grade 9 steel hex head cap screw with a 5/8-11 thread size and a 4.5-inch length under the head. Partially threaded along the shank, this fastener is designed for high-strength bolted joint applications where clamping load and shear resistance are critical. The Bowma-Guard finish provides corrosion protection suited to demanding industrial and mechanical environments. Installed using standard hex tooling, this cap screw is a direct choice for maintenance crews, millwrights, and mechanical contractors working on heavy equipment, structural assemblies, or industrial machinery.

Grade 9 hex cap screws like the BOWMP36158 are typically used in heavy-duty industrial applications including agricultural equipment, mining machinery, construction equipment, and structural connections requiring higher proof load than SAE Grade 5 or Grade 8 fasteners. The partial thread configuration concentrates clamping force across an unthreaded bearing shank, making it well suited for joints with lateral loading or precision fit requirements. Available in a package quantity of 10.

Key Features

• Grade 9 steel construction for higher tensile and proof load than standard Grade 8 fasteners
• 5/8-11 UNC thread size for compatibility with standard inch-series nuts and tapped holes
• 4.5-inch length under head accommodates thicker joint stacks
• Partial threading provides an unthreaded shank for shear-load and close-tolerance applications
• Bowma-Guard finish offers corrosion resistance in harsh service environments
• Sold in packages of 10 for job-lot stocking

Compatibility

Designed as an OEM-style replacement or stocking fastener for 5/8-11 UNC hex cap screw applications requiring Grade 9 material specification and partial thread configuration.

Installation Notes

Hex head cap screws should be installed by qualified mechanical technicians or millwrights following applicable torque specifications from engineering references such as the ASME or AISC standards for the fastener grade and joint material. Always de-energize and lock out equipment before replacing structural or mechanical fasteners. Use calibrated torque tooling appropriate for the joint design, and inspect mating threads for damage before installation.