Bowmalloy 36211 Hex Head Cap Screw 7/8-9 X 9 in Grade 9

Product Description

The BOWMALLOY 36211 is a Grade 9 alloy steel hex head cap screw designed for high-strength fastening applications. It features a 7/8-9 thread size and a 9-inch length under the head, with partial threading along the shank. The zinc-plated clear chromate finish provides corrosion resistance in demanding environments. This fastener is installed by millwrights, ironworkers, structural mechanics, and maintenance professionals working on heavy equipment, structural steel, and industrial assemblies where high tensile strength is required.

This cap screw is suited for heavy industrial and structural applications requiring a high-strength, inch-series fastener. Grade 9 alloy steel offers superior proof load and tensile strength compared to Grade 5 or Grade 8 fasteners, making it appropriate for high-stress bolted connections in construction equipment, agricultural machinery, and industrial fabrication. The 7/8-9 coarse thread pattern allows for faster assembly and good resistance to stripping under load.

Key Features

• Grade 9 alloy steel construction for high tensile and proof load strength
• 7/8-9 UNC coarse thread for fast engagement and strip resistance
• 9-inch length under head accommodates thick structural assemblies
• Partial threading preserves shank grip strength in bearing applications
• Zinc-plated clear chromate finish adds corrosion protection in service environments

Compatibility

Designed as an inch-series hex head cap screw for use with standard 7/8-9 UNC nuts and tapped holes in heavy industrial, structural, and equipment assembly applications.

Installation Notes

Installation should be performed by qualified mechanics or ironworkers following applicable structural or equipment manufacturer torque specifications for Grade 9 fasteners. Use a properly sized hex wrench or impact socket rated for high-torque applications. Inspect mating threads and bearing surfaces for damage before assembly. Follow applicable ASME or structural code requirements for fastener installation in safety-critical connections.