5/16-24 Zinc Nylon Insert Locknut

Description

5/16-24 Zinc Nylon Insert Locknut is a light-duty fastener with a zinc-plated finish suited for dry, indoor fastening applications where vibration resistance is needed but heavy corrosion protection or high-strength performance is not required.

Nylon insert locknuts have a six-sided nut body with a nylon collar permanently embedded in the top of the nut, designed to grip the threads of a mating bolt or rod and resist loosening from vibration without damaging the fastener. 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 nylon insert locknuts 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

5/16-24 Zinc Nylon Insert Locknut Features

• Nylon insert collar permanently embedded in the top of the nut creates an interference fit with mating bolt threads, resisting loosening from vibration and dynamic stress without damaging the fastener surface
• Reusable locking action remains effective through multiple assembly and disassembly cycles, though locking effectiveness decreases with repeated use
• Light corrosion protection from zinc plating, suitable for general-purpose indoor and dry-environment assemblies

Common Uses

• Indoor machinery, appliance, and equipment assemblies where vibration resistance is a priority in dry environments
• General indoor construction and light manufacturing applications requiring a reliable, removable locking fastener solution
• Non-critical structural connections in shelving, framing, and interior fixtures where loosening from vibration is a concern

Application

• Thread onto a compatible bolt or threaded rod by hand until the nut body contacts the mating surface, then tighten with a wrench or socket sized to the hex body
• Additional torque will be required as the bolt threads engage the nylon insert — this resistance confirms the locking action is engaged
• Use with a washer between the nut and mating surface to distribute load and prevent surface damage where required

Tips

• Always verify that the bolt or threaded rod shares the same thread diameter and pitch as the nylon insert locknut before assembly
• Nylon insert locknuts are measured by their thread diameter and pitch, matching the bolt or threaded rod they are paired with
• Zinc nylon insert locknuts are not recommended for exterior, high-moisture, or corrosive environments, or for high-temperature applications where sustained heat may degrade the nylon insert — use SS 18-8 for corrosive environments or Grade C Zinc and Grade 8 Yellow Zinc for higher strength requirements