Bowmalloy BOWMP36801 Hex Lock Nut 5/8-18 Grade 9

Product Description

The BOWMALLOY BOWMP36801 is a Grade 9 steel hex lock nut engineered for high-strength fastening applications where vibration resistance and joint integrity are critical. Threaded 5/8-18 UNF right-hand, it features a Bowma-Guard protective finish that provides corrosion resistance in demanding service environments. With a width across flats of 0.9375 inches (15/16 inches) and a height of 0.545 inches, the nut is dimensioned to SAE standards for consistent tool fit and reliable torque transfer. Licensed trade professionals and maintenance technicians working on heavy-duty mechanical assemblies are the primary installers of this fastener.

This hex lock nut is suited for industrial, commercial, and heavy equipment applications where Grade 9 alloy steel strength and a fine UNF thread pitch are required. The 5/8-18 thread size is common in drivetrain, structural, and mechanical system assemblies. The right-hand thread direction is standard for the vast majority of fastening applications. It is sold in packages of 10 pieces, making it practical for both single-unit repair work and small-batch production or maintenance tasks.

Key Features

• Grade 9 steel construction delivers high tensile and proof load strength beyond standard Grade 5 and Grade 8 specifications
• 5/8-18 UNF right-hand thread provides fine-pitch engagement for precision clamping and vibration-resistant locking
• Bowma-Guard finish offers corrosion protection for use in exposed or moderately harsh environments
• Width across flats of 0.9375 inches (15/16 inches) compatible with standard SAE wrench and socket sizes
• Height of 0.545 inches provides sufficient thread engagement for full-strength fastening
• Packaged in quantities of 10 to support repair, maintenance, and light production workflows

Compatibility

Designed as an OEM-style replacement or service fastener for assemblies requiring a 5/8-18 UNF Grade 9 hex lock nut with a right-hand thread direction.

Installation Notes

Installation is performed by qualified mechanics, millwrights, or maintenance technicians working on mechanical assemblies. Always de-energize and lock out equipment before replacing fasteners in moving or powered assemblies. Use a calibrated torque wrench and follow the assembly manufacturer's torque specifications for Grade 9 hardware. Inspect mating threads for damage or contamination before installation to ensure full thread engagement and proper locking function.