Bowmalloy BOWMP36457 Hex Head Cap Screw 5/8-18 X 4 in

Product Description

The BOWMALLOY BOWMP36457 is a Grade 9 steel hex head cap screw with a 5/8-18 thread size and a 4-inch length under head. It features partial threading and a Bowma-Guard finish, which provides enhanced corrosion resistance for demanding service environments. This fastener is built to handle high-strength bolted joint applications where clamping force, torque retention, and finish durability are critical requirements. Installation is performed by mechanics, millwrights, and maintenance technicians working across industrial, heavy equipment, and commercial assembly applications.

This hex head cap screw is suited for use in high-load bolted connections found in industrial machinery, heavy-duty equipment, structural assemblies, and mechanical systems requiring inch-series fine-thread fasteners. The 5/8-18 fine thread pitch provides superior thread engagement and resistance to loosening under vibration, making it appropriate for dynamic load applications. Partial threading allows the unthreaded shank to bear shear loads in precision-fit joints.

Key Features

• Grade 9 steel construction for high tensile and proof load strength
• 5/8-18 fine thread pitch for improved vibration resistance and precise torque control
• 4-inch length under head with partial threading to support shear-loaded joints
• Bowma-Guard finish for enhanced corrosion protection in harsh environments
• Inch measurement system for compatibility with standard inch-series tooling and hardware

Compatibility

Designed as a high-strength inch-series fastener for use in bolted assemblies requiring 5/8-18 fine thread, Grade 9 specification hardware.

Installation Notes

Installation should be performed by qualified mechanics or maintenance technicians using calibrated torque wrenches appropriate for Grade 9 fasteners. Ensure mating threads are clean, undamaged, and free of debris before assembly. Follow applicable industry torque specifications for the joint design and material stack-up. Do not substitute Grade 9 hardware with lower-grade fasteners in high-strength applications.