Bowmalloy BOWMP36781 Hex Lock Nut 5/16-18 Grade 9

Product Description

The BOWMALLOY BOWMP36781 is a Grade 9 steel hex lock nut sized for 5/16-18 inch thread, finished with a Bowma-Guard protective coating. Hex lock nuts resist vibration-induced loosening, making them a standard fastener in mechanical assemblies across HVAC, plumbing, and structural applications. This nut measures 0.5 inches across the flats and 0.268 inches in height, uses right-hand threading, and conforms to inch-measurement standards. The Bowma-Guard finish provides corrosion resistance suited to demanding service environments. Each package contains 50 nuts.

This hex lock nut is appropriate for general mechanical and structural assemblies where vibration or dynamic loading could compromise a standard nut. Common install scenarios include equipment mounting, pipe support brackets, electrical enclosure hardware, and HVAC component fastening. The 5/16-18 thread size is widely used in residential and light commercial equipment frames and support structures. Tradespeople across HVAC, plumbing, and electrical disciplines will encounter this thread size on a routine basis.

Key Features

• Grade 9 steel construction for high strength and durability
• 5/16-18 right-hand thread, inch measurement system
• 0.5 inch width across flats for standard hex wrench fitment
• 0.268 inch height - compact profile for tight clearance applications
• Bowma-Guard finish for corrosion resistance in service environments
• Sold in a package of 50 for field and shop stock replenishment

Compatibility

Designed as a standard replacement or stocking fastener for any mechanical assembly requiring a 5/16-18 inch right-hand thread hex lock nut in Grade 9 steel.

Installation Notes

Install using a standard hex wrench or socket sized to 0.5 inches across the flats. Ensure mating threads are clean and free of debris before engagement. Lock nuts are typically torqued to the fastener manufacturer's specification for the grade and thread size in use - consult applicable torque tables from your fastener reference or job specification. Always de-energize or depressurize any equipment before replacing or tightening fasteners on active systems.