Bowmalloy BOW36806 Hex Lock Nut 1-1/4-12 Grade 9

Product Description

The BOWMALLOY BOW36806 is a Grade 9 steel hex lock nut with a 1-1/4-12 thread size and a Bowma-Guard protective finish. Hex lock nuts are used to secure bolted joints against loosening caused by vibration, torque, or dynamic loading. This nut features right-hand threading and is manufactured to inch-system dimensions, making it a high-strength fastener suited for demanding mechanical and structural assemblies. The Bowma-Guard finish provides corrosion resistance over the Grade 9 steel base. Licensed tradespeople and mechanical contractors working on heavy equipment, structural frames, or industrial machinery are the typical installers of fasteners in this class.

This hex lock nut is appropriate for high-load bolted connections in industrial, construction, and heavy equipment applications where a standard Grade 5 or Grade 8 nut would be insufficient. Grade 9 steel offers elevated proof load and tensile strength compared to lower-grade hardware. The 1-1/4-12 thread designation indicates a fine-pitch thread series, which provides greater thread engagement per inch and is commonly specified in applications requiring precise clamping force control or resistance to vibration-induced loosening.

Key Features

• Grade 9 steel construction for high-strength bolted joint applications
• Fine-pitch 1-1/4-12 thread for increased vibration resistance and clamping precision
• Bowma-Guard finish for added corrosion protection
• Right-hand thread direction, compatible with standard inch-series fastener tooling
• 1-1/16 inch height and 1-7/8 inch width across flats for standard wrench fitment

Compatibility

Designed for use with 1-1/4-12 inch-series threaded fasteners in Grade 9 or compatible high-strength bolted assemblies.

Installation Notes

Installation should be performed by a qualified mechanic or tradesperson familiar with high-strength fastener procedures. Always degrease or prepare mating threads per the applicable fastener specification before assembly. Use a calibrated torque wrench to achieve the specified clamp load for the joint design. Do not mix Grade 9 hardware with lower-grade nuts or bolts in the same joint.