Bowmalloy BOW36611 Hex Nut 1/4-28 Grade 9

Product Description

The BOWMALLOY BOW36611 is a Grade 9 steel hex nut with a 1/4-28 UNF thread size and a zinc-plated clear chromate finish, marketed under the Bowma-Guard coating designation. It is designed for high-strength fastening applications where corrosion resistance and hardness are critical. With a hardness rating of 26-36 HRC and a right-hand thread direction, this nut meets ANSI/ASME B18.2.2 dimensional standards. Installation is performed by mechanical assemblers, maintenance technicians, and trade professionals working on equipment requiring fine-threaded, high-strength fasteners.

This hex nut is suited for use in industrial, commercial, and heavy mechanical assemblies where Grade 9 fastener strength is specified. The fine 1/4-28 thread pitch provides strong thread engagement in steel and similarly hard base materials. It is sold in packages of 100 units, making it practical for production or service shops maintaining fastener inventory. Typical applications include equipment frames, brackets, and precision mechanical joints requiring high clamping force in tight quarters.

Key Features

• Grade 9 steel construction with 26-36 HRC hardness for high-strength fastening
• Zinc-plated Bowma-Guard finish provides corrosion resistance in exposed environments
• 1/4-28 UNF right-hand thread for fine-pitch engagement and secure clamping
• Meets ANSI/ASME B18.2.2 fastener dimensional standard
• Width across flats of 0.437 inches for standard 7/16-inch wrench fitment
• Packaged in quantities of 100 for shop and production use

Compatibility

Designed as a standard-dimension hex nut per ANSI/ASME B18.2.2 for use with any 1/4-28 UNF-threaded fastener application requiring Grade 9 strength.

Installation Notes

Installation should be performed by a qualified mechanic or technician familiar with high-strength fastener assemblies. De-energize and lock out any associated equipment before fastener service. Use a calibrated torque wrench appropriate for Grade 9 hardware and follow the torque specifications provided by the equipment manufacturer. Do not mix Grade 9 nuts with lower-grade bolts or studs, as mismatched hardware grades compromise joint integrity.