Bowmalloy BOW36154 Hex Head Cap Screw 5/8-11 Grade 9

Product Description

The BOWMALLOY BOW36154 is a Grade 9 steel hex head cap screw sized 5/8-11 with a length under head of 3.25 inches. It features partial threading and a Bowma-Guard zinc-plated clear chromate finish, which provides corrosion resistance in demanding installation environments. This fastener is designed for high-strength bolted connections where a standard Grade 5 or Grade 8 screw does not meet load requirements. Mechanical contractors, structural fabricators, and field technicians working on heavy equipment or structural assemblies will find this cap screw appropriate for applications requiring elevated tensile and proof load ratings.

This cap screw is suited for industrial, commercial, and heavy-duty mechanical applications. The 5/8-11 thread designation follows Unified National Coarse thread standards, making it compatible with standard hex nuts and threaded holes of the same specification. The partial threading keeps the unthreaded shank section intact for shear-load-bearing connections. Sold in packages of 25 units per the supplier package quantity.

Key Features

• Grade 9 steel construction provides higher tensile strength than standard Grade 5 or Grade 8 fasteners
• 5/8-11 UNC thread for compatibility with standard coarse-thread hardware
• 3.25-inch length under head accommodates thicker material stacks
• Partial threading preserves shank section for shear-load applications
• Bowma-Guard zinc-plated clear chromate finish for corrosion resistance
• Sold in 25-count packages with a minimum order quantity of 1 package

Compatibility

Designed for use with standard 5/8-11 UNC hex nuts, washers, and threaded fixtures following Unified National Coarse thread specifications.

Installation Notes

Installation is typically performed by mechanical contractors, millwrights, or structural tradespeople using standard hex wrenches or impact sockets rated for 5/8-inch fasteners. Follow applicable torque specifications from the equipment manufacturer or relevant structural codes for Grade 9 fasteners. Ensure mating threaded components match the 5/8-11 UNC thread specification before installation. Inspect the Bowma-Guard finish for damage prior to use in corrosive environments.