Value Collection HFNI20500-050BX Serrated Flange Nut 1/2-13

Product Description

The VALUE COLLECTION HFNI20500-050BX is a serrated flange nut manufactured from Grade 2 steel with a zinc-plated finish. The integrated flange distributes clamping load over a wider bearing surface, while the serrated underside bites into the mating material to resist loosening under vibration. Thread size is 1/2-13 UNC. Flange diameter measures 1.031 inches and flange height measures 0.458 inches. The zinc coating provides basic corrosion resistance suitable for general indoor and light outdoor applications. This fastener is installed by mechanics, maintenance technicians, HVAC installers, plumbers, and general tradespeople wherever a prevailing-torque or lock-washer-free connection is needed.

This serrated flange nut is used across a wide range of residential and light commercial assembly and repair applications. It is well suited for structural attachments, equipment mounting, ductwork supports, piping hangers, and mechanical assemblies where vibration or movement could back off a standard hex nut. The self-locking serrations eliminate the need for a separate lock washer, simplifying the fastener stack and reducing parts count on the job.

Key Features

• Serrated flange underside resists loosening without a separate lock washer
• 1/2-13 UNC thread for broad compatibility with standard inch-series fastener hardware
• Flange diameter of 1.031 inches provides an enlarged bearing surface for load distribution
• Grade 2 steel construction suitable for general-purpose fastening applications
• Zinc-plated finish offers basic corrosion protection for light-duty environments
• Width across flats up to 0.750 inches fits standard 3/4-inch hex tooling

Compatibility

Designed as a general-purpose serrated flange nut for use with 1/2-13 UNC threaded bolts, studs, and rods in standard inch-series mechanical assemblies.

Installation Notes

Installation requires a 3/4-inch wrench or socket. Ensure mating threads are clean and free of debris before assembly. The serrated flange is intended to seat directly against the workpiece surface — do not install a flat washer between the flange and the mating material, as this defeats the locking serrations. Follow applicable torque guidelines for Grade 2 steel fasteners per the assembly specification or applicable mechanical code.