3/8-16 Flange Nut

Description

3/8-16 Zinc Flange Nut is a light-duty fastener with a zinc-plated finish suited for dry, indoor fastening applications where load distribution and vibration resistance are needed but heavy corrosion protection is not required.

Flange nuts have a wide, circular flange at the base of a standard hexagonal nut body, with a fully threaded interior designed to distribute load across a broader surface area. Their six-sided body allows for easy tightening with standard wrenches and sockets, and the zinc plating provides basic corrosion protection for general-purpose interior assemblies.

Zinc

• Zinc flange nuts are plated with a thin zinc coating that provides light corrosion resistance suitable for non-critical applications
• These are best suited for dry, indoor environments where exposure to moisture, chemicals, or the elements is not a concern

3/8-16 Zinc Flange Nut Features

• Integrated flange acts as a built-in washer, distributing clamping load over a wider surface area and reducing the risk of surface damage or pull-through
• Serrated or smooth flange face provides additional grip against the mating surface, improving resistance to loosening from vibration
• Light corrosion protection from zinc plating, suitable for general-purpose indoor and dry-environment assemblies

Common Uses for Flange Nuts

• Indoor automotive, machinery, and appliance assemblies where vibration resistance and installation efficiency are priorities
• General construction and light manufacturing applications in dry, indoor environments
• Interior structural connections where load distribution across a wider bearing surface is needed without the cost of stainless steel

Application

• Thread onto a compatible bolt or threaded rod by hand until the flange face contacts the mating surface, then tighten with a wrench or socket sized to the hex body
• Ensure the flange face sits flush and fully contacts the mating surface before final tightening
• No separate washer is required in most applications — the integrated flange provides the bearing surface

Tips

• Always verify that the bolt or threaded rod shares the same thread diameter and pitch as the flange nut before assembly
• Flange nuts are measured by their thread diameter and pitch, matching the bolt or threaded rod they are paired with
• Zinc flange nuts are not recommended for exterior, high-moisture, or corrosive environments — use SS 18-8 for those applications