Bowmalloy 36122 Hex Head Cap Screw 1/2-13 X 7 in Grade 9

Product Description

The BOWMALLOY 36122 is a Grade 9 alloy steel hex head cap screw designed for high-strength fastening applications in heavy-duty mechanical and structural assemblies. It features a 1/2-13 unified coarse thread with a 7-inch length under the head and is partially threaded, allowing for a solid unthreaded shank in the grip area. A clear zinc chromate finish provides corrosion resistance suitable for general industrial environments. This fastener is installed by millwrights, ironworkers, maintenance technicians, and contractors working on equipment that demands high tensile and proof load performance beyond standard Grade 5 or Grade 8 specifications.

This cap screw is suited for use in industrial machinery, heavy equipment mounting, structural steel connections, and other applications where elevated clamping force and shear strength are required. The 1/2-13 coarse thread profile is widely used in ferrous metal assemblies and is compatible with standard 1/2-13 hex nuts and threaded inserts. Its partial threading is typical in bolted joint designs where the unthreaded shank bears the load in shear across the joint interface.

Key Features

• Grade 9 alloy steel construction delivers higher tensile strength than Grade 8 fasteners
• 1/2-13 unified coarse (UNC) thread for broad compatibility with standard hardware
• Partial threading preserves shank integrity under shear loading
• Clear zinc chromate finish provides corrosion protection in general industrial environments
• 7-inch length under head accommodates thick structural or equipment members

Compatibility

Designed as a standard 1/2-13 UNC hex head cap screw for use with compatible 1/2-13 hex nuts, flat washers, and lock washers in inch-system fastener assemblies.

Installation Notes

Installation should be performed by qualified mechanical or structural tradespeople following applicable torque specifications for Grade 9 fasteners per the relevant ASME or OEM guidelines. Always de-energize or lock out equipment before performing fastener replacement on live machinery. Use a calibrated torque wrench to achieve proper clamp load without exceeding material yield limits. Inspect threads and mating hardware for damage or corrosion before installation.