Bowmalloy BOW-36610-11/8 Hex Nut 1-1/8-7 Grade 9

Product Description

The BOWMALLOY BOW-36610-11/8 is a heavy-duty hex nut designed for high-strength bolted connections in demanding structural and industrial applications. Manufactured from Grade 9 steel with a Bowma-Guard protective finish, this nut delivers exceptional tensile strength and corrosion resistance. It features a 1-1/8-7 thread size with a right-hand thread direction and a 2B thread fit class, making it suitable for precision-critical assemblies. The Bowma-Guard finish provides an added layer of protection against environmental exposure. Hardness is rated at 26-36 HRC, reflecting the high-grade material standards appropriate for heavy mechanical and structural installations performed by qualified tradespeople.

This hex nut is used in heavy-duty structural bolting, industrial machinery assembly, and high-load mechanical connections where standard grade fasteners are insufficient. The 1-1/8-7 thread specification places it in large-diameter fastener territory, typically found in steel construction, heavy equipment, bridge work, and industrial fabrication environments. Installation is performed by ironworkers, millwrights, pipefitters, and mechanical contractors working on structural or process equipment requiring high-torque, high-clamp-load fastener assemblies.

Key Features

• Grade 9 steel construction for superior tensile and proof load strength
• Bowma-Guard finish for enhanced corrosion and environmental resistance
• 1-1/8-7 UNC thread with right-hand direction and 2B fit class for precise thread engagement
• Hardness rated 26-36 HRC for consistent performance under high-load conditions
• Width across flats of 1.688 inches for standard heavy-hex tooling compatibility
• Height of 1.176 inches providing full load-bearing thread engagement depth

Compatibility

Designed as a high-strength replacement or new-installation hex nut for 1-1/8-7 UNC threaded fastener assemblies requiring Grade 9 steel with a 2B thread fit class.

Installation Notes

Installation should be performed by qualified tradespeople using calibrated torque wrenches appropriate for large-diameter, high-strength fasteners. Always verify thread compatibility and fit class before assembly. Follow applicable structural or mechanical codes and engineering specifications for torque requirements specific to the assembly. Inspect threads for damage or contamination before installation to ensure proper seating and clamp load.