Value Collection R63084361 Heavy Hex Nut 5/16-18 Unc

Product Description

The VALUE COLLECTION R63084361 is a heavy hex nut threaded to the 5/16-18 UNC standard, manufactured from 18-8 stainless steel with a bright uncoated finish. Heavy hex nuts carry a wider and taller profile than standard hex nuts, providing greater bearing surface and improved torque distribution in structural and mechanical fastening applications. The 18-8 stainless steel construction delivers solid corrosion resistance in wet, outdoor, and mildly chemical environments. This nut is installed by plumbers, pipefitters, HVAC technicians, electricians, and general mechanical contractors wherever a reliable, corrosion-resistant fastener is required.

This heavy hex nut is suited for residential and commercial installations requiring stainless fasteners, including pipe flange connections, equipment mounting, structural assemblies, and general mechanical work. The right-hand thread engages standard UNC-threaded bolts and studs sized at 5/16-18. It is commonly used in plumbing, HVAC equipment assembly, pool equipment mounting, and electrical enclosure work where moisture exposure demands stainless hardware.

Key Features

• Heavy hex profile with 9/16 inch width across flats for increased bearing surface
• 5/16-18 UNC right-hand thread for compatibility with standard fractional bolts and studs
• 18-8 stainless steel construction provides corrosion resistance in wet and outdoor environments
• Bright uncoated finish — no plating to flake or chip under torque
• 19/64 inch height adds strength compared to standard hex nut profile
• Does not meet military specifications — appropriate for commercial and trade applications

Compatibility

Designed for use with 5/16-18 UNC threaded bolts, screws, and studs in standard fractional fastener assemblies. Suitable for use wherever a heavy hex nut in 18-8 stainless steel is specified.

Installation Notes

Install with the correct 9/16 inch wrench or socket. Apply consistent torque to avoid galling, which is common with stainless steel fasteners — anti-seize compound is recommended on the threads prior to assembly. Always de-energize equipment and shut off fluid systems before servicing fastened assemblies. Follow applicable mechanical and plumbing codes for torque and fastener specifications in your jurisdiction.