Bowmalloy BOW36387 Hex Cap Screw 7/16-20 3in Grade 9

Product Description

The BOWMALLOY BOW36387 is a Grade 9 steel hex head cap screw sized 7/16-20 with a 3-inch length under head and partial threading. Grade 9 hardware delivers higher proof load and tensile strength than Grade 5 or Grade 8 fasteners, making this screw well suited for high-stress mechanical assemblies. The Bowma-Guard zinc-plated clear chromate finish provides corrosion resistance in typical shop and field environments. This fastener follows inch-series thread standards and is used by mechanical contractors, equipment assemblers, and maintenance technicians working on heavy-duty bolted connections.

This cap screw is appropriate for structural and mechanical fastening applications where a fine-thread, high-strength inch-series fastener is required. The 7/16-20 fine thread pitch provides increased thread engagement and improved resistance to vibration loosening compared to coarse-thread equivalents. Partial threading allows the unthreaded shank to carry shear loads in precision joint applications. Typical uses include agricultural equipment, heavy machinery, and industrial assemblies where Grade 9 torque capacity is specified.

Key Features

• Grade 9 steel construction for high proof load and tensile strength
• 7/16-20 fine thread pitch for improved vibration resistance and thread engagement
• 3-inch length under head with partial threading for shear-load joint applications
• Bowma-Guard zinc-plated clear chromate finish for corrosion resistance
• Inch-series measurement system for compatibility with standard SAE tooling

Compatibility

Designed as a high-strength inch-series hex head cap screw for use in mechanical assemblies, agricultural equipment, and industrial machinery that require 7/16-20 fine-thread Grade 9 fasteners.

Installation Notes

Installation should be performed by a qualified mechanic or maintenance technician using a calibrated torque wrench sized for 7/16-inch hex hardware. Always verify mating thread condition and clean fastener holes before installation. Do not mix Grade 9 fasteners with lower-grade nuts or threaded inserts, as the joint strength will be limited by the weaker component. Follow the equipment manufacturer's torque specifications and any applicable industry standards for the assembly.