Value Collection 87NR Serrated Flange Nut 7/8-9 Zinc-plated

Product Description

The VALUE COLLECTION 87NR is a Grade 2 steel serrated flange nut with a 7/8-9 UNC thread and a zinc-plated finish for corrosion resistance. The integrated serrated flange distributes clamping load across a wider bearing surface and bites into the mating material to resist loosening under vibration. The flange diameter measures 1.682 inches and the flange height measures 1.513 inches. It is used in general mechanical assemblies, structural fastening, and equipment maintenance across HVAC, plumbing, electrical, and industrial trade applications. Licensed technicians and maintenance professionals install these nuts in applications where vibration resistance and load distribution are required.

This serrated flange nut is suited for residential and commercial mechanical assemblies requiring a 7/8-9 inch-threaded fastener. The serrated bearing face makes it effective in high-vibration environments such as equipment mounts, bracket assemblies, and structural connections. The zinc-plated finish provides a basic level of corrosion protection suitable for interior and dry-environment applications. It is installed using standard open-end, box-end, or socket wrenches sized to the 1.166 to 1.179 inch across-flats dimension.

Key Features

• Serrated flange face resists loosening under vibration without a separate lock washer
• Grade 2 steel construction with Rockwell HR15N 78-90 hardness rating
• Zinc-plated finish provides corrosion resistance for general-use environments
• Wide 1.682 inch flange diameter distributes clamping load across the mating surface
• 7/8-9 UNC thread size fits standard inch-system fastener applications
• Width across flats of 1.166 to 1.179 inches is compatible with standard wrench and socket sizes

Compatibility

Designed as a standard inch-system serrated flange nut for use in any mechanical assembly requiring a 7/8-9 UNC threaded fastener with an integrated serrated locking flange.

Installation Notes

Install and remove using a standard open-end, box-end, or socket wrench sized to the across-flats dimension. Ensure the serrated face seats fully and squarely against the mating surface to achieve the locking function. De-energize or shut down any equipment before servicing fasteners on live assemblies. Follow applicable torque specifications from the equipment manufacturer or relevant industry standards for the fastener grade and size.