Value Collection 34293 Serrated Flange Nut 5/16-18 Zinc-plated

Product Description

The VALUE COLLECTION 34293 is a serrated flange nut designed for secure fastening in mechanical, HVAC, plumbing, and general trade applications. It features a built-in serrated flange that bites into the mating surface to resist loosening under vibration, eliminating the need for a separate lock washer. The nut is manufactured from Grade 2 steel with a zinc-plated finish for basic corrosion resistance. The 5/16-18 UNC thread size is one of the most common inch-series thread specifications used across trade work. Licensed tradespeople and maintenance technicians install these nuts in panel assemblies, ductwork supports, equipment mounting, and structural brackets.

This serrated flange nut is suited for residential and light commercial applications where vibration resistance is needed without adding extra hardware. Typical uses include equipment mounting, conduit supports, sheet metal assemblies, and general mechanical fastening. The zinc-plated finish provides surface protection in dry to mildly humid indoor environments. With a flange diameter of 0.68 inches and a thread size of 5/16-18, this nut fits standard 5/16-inch bolts and threaded rods commonly found across HVAC, electrical, and plumbing installations.

Key Features

• Serrated flange face locks against the mating surface to resist vibration-induced loosening
• Grade 2 steel construction provides adequate strength for general trade fastening applications
• Zinc-plated finish offers basic corrosion protection in indoor environments
• 5/16-18 UNC thread is a widely used inch-series thread found across HVAC, electrical, and mechanical assemblies
• Integrated flange eliminates the need for a separate flat or lock washer
• Compact flange height of 0.283 inches keeps the installed profile low in tight spaces

Compatibility

Designed as a standard replacement or stock fastener for any assembly requiring a 5/16-18 inch-series serrated flange nut in general mechanical, HVAC, electrical, or plumbing trade applications.

Installation Notes

Install using an appropriately sized wrench or socket matching the 0.489 to 0.500 inch width-across-flats dimension. Ensure the serrated flange face seats directly against a clean, flat metal surface for maximum locking effectiveness. Do not install over painted, plastic, or soft surfaces where serrations cannot fully engage. Follow applicable codes such as NEC or IFGC when using fasteners in code-governed assemblies, and torque to fastener-grade recommendations from the relevant specification or equipment manufacturer.