Bowmalloy 36611 Hex Nut 1/4-28 Grade 9 Steel

Product Description

The BOWMALLOY 36611 is a Grade 9 steel hex nut with a 1/4-28 UNF thread and a zinc-plated clear chromate finish. It is designed for high-strength fastening applications where superior hardness and corrosion resistance are required. The nut meets ANSI/ASME B18.2.2 dimensional standards and carries a hardness rating of 26-36 HRC, making it suitable for demanding mechanical assemblies. The right-hand thread conforms to standard installation practice. Machinists, maintenance technicians, and industrial assembly professionals use this nut where Grade 5 or Grade 8 hardware is insufficient for the load or environment.

This hex nut is appropriate for use in high-stress mechanical and industrial applications, including equipment manufacturing, structural assemblies, and heavy-duty machinery. The 1/4-28 UNF fine thread pitch provides excellent holding strength and resistance to vibration loosening, making it a common choice in applications subject to dynamic loading. The clear zinc chromate plating offers a baseline level of corrosion protection suitable for general indoor and light outdoor service conditions.

Key Features

• Grade 9 steel construction with 26-36 HRC hardness for high-strength fastening
• 1/4-28 UNF fine right-hand thread for superior vibration resistance
• Zinc-plated clear chromate finish for corrosion protection
• 7/16-inch width across flats for standard wrench fitment
• Meets ANSI/ASME B18.2.2 fastener dimensional standard
• Sold in quantities of 100 per package

Compatibility

Designed as a standard 1/4-28 UNF hex nut for use with any Grade 9 or compatible threaded fastener of matching thread size and pitch in industrial and mechanical assemblies.

Installation Notes

Installation should be performed by qualified mechanical or maintenance technicians familiar with high-strength fastener specifications. Ensure mating bolt or stud is of compatible thread class and grade before assembly. Use a calibrated torque wrench appropriate for 1/4-28 UNF fasteners and follow the applicable torque specifications for the assembly or equipment manufacturer. Do not mix Grade 9 hardware with lower-grade fasteners in the same joint.