Bowmalloy BOW36059 Hex Head Cap Screw 3/8-16 Grade 9

Product Description

The BOWMALLOY BOW36059 is a Grade 9 steel hex head cap screw with a 3/8-16 thread size and a 2-1/4 inch length under head. It features partial threading and a Bowma-Guard zinc-plated clear chromate finish, providing corrosion resistance in demanding environments. This fastener is built for high-strength bolted connections where standard Grade 5 or Grade 8 hardware is insufficient. It is commonly installed by mechanical contractors, industrial maintenance technicians, and equipment assemblers working on heavy-duty structural and mechanical applications.

This cap screw is suited for use in industrial machinery, heavy equipment assembly, structural steel connections, and trade installations requiring a high-strength inch-series fastener. The 3/8-16 coarse thread pattern is compatible with standard UNC tapped holes and hex nuts. Partial threading allows the unthreaded shank to bear shear loads, making it appropriate for joint designs where bolt shank engagement with the mating material is required.

Key Features

• Grade 9 steel construction for high tensile and proof load strength beyond standard Grade 8
• Bowma-Guard zinc-plated clear chromate finish for corrosion resistance
• Partial threading allows shank to carry shear loads in structural joints
• 3/8-16 UNC coarse thread for broad compatibility with standard nuts and tapped holes
• 2-1/4 inch length under head suits medium-depth clamping applications
• Inch measurement system for direct use in standard U.S. fastener specifications

Compatibility

Designed as a high-strength replacement or service fastener for applications requiring a 3/8-16 UNC hex head cap screw with Grade 9 strength rating and partial threading. Compatible with standard UNC hex nuts, flat washers, and tapped holes conforming to inch-series dimensional standards.

Installation Notes

Installation should be performed by a qualified mechanic or technician familiar with high-strength fastener torque requirements for Grade 9 hardware. De-energize and lock out any equipment before replacing fasteners on machinery or electrical enclosures. Use a properly calibrated torque wrench and follow the equipment manufacturer's torque specification for 3/8-16 Grade 9 fasteners. Inspect mating threads for damage or contamination before assembly to ensure full clamp load is achieved.