Bowmalloy BOW36211 Hex Head Cap Screw 7/8-9x9 Grade 9

Product Description

The BOWMALLOY BOW36211 is a Grade 9 steel hex head cap screw with a 7/8-9 thread size and a 9-inch length under the head. It features partial threading and a Bowma-Guard zinc-plated clear chromate finish, which provides corrosion resistance in demanding service environments. This fastener is designed for high-strength bolted connections where standard Grade 5 or Grade 8 hardware does not meet load or torque requirements. It is used across industrial, heavy equipment, agricultural machinery, and structural assembly applications. Installation is performed by millwrights, mechanical contractors, and maintenance technicians working with inch-series fasteners.

This screw suits applications that require a coarse 7/8-9 UNC thread form with partial threading along the shank. The 9-inch length accommodates thick joint stacks or through-bolt configurations common in heavy fabrication and machinery mounting. The Grade 9 material specification delivers higher proof load and tensile strength than standard Grade 8 fasteners, making it appropriate for high-stress assemblies subject to vibration or dynamic loading. Sold in a package quantity of 2.

Key Features

• Grade 9 steel construction for elevated proof load and tensile strength beyond standard Grade 8
• 7/8-9 UNC coarse thread form in inch measurement system
• 9-inch length under head for thick joint stacks and through-bolt applications
• Partial threading preserves shank grip length for shear-loaded connections
• Bowma-Guard zinc-plated clear chromate finish for corrosion resistance

Compatibility

Designed as a high-strength inch-series replacement fastener for any application requiring a 7/8-9 UNC hex head cap screw at 9 inches in length with Grade 9 material specification.

Installation Notes

Installation is typically performed by qualified millwrights or mechanical technicians using appropriately rated hand or power torque tools. Always consult the equipment manufacturer's torque specification table for Grade 9 fasteners before final tightening. De-energize and lock out all equipment per applicable OSHA lockout/tagout procedures before fastener replacement. Inspect mating threads and bearing surfaces for damage before installation.