1/4-20 SS Nylon Insert Locknut

Description

1/4-20 SS Nylon Insert Locknut is a high-quality, durable fastener that offers greater corrosion resistance than Grade 8, Grade C, or Zinc alternatives, often used in moisture-exposed, exterior, or corrosive environments where vibration resistance is also 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 stainless steel construction provides reliable performance in demanding environments while maintaining a clean, polished appearance.

Stainless Steel (SS) 18-8

• Stainless Steel 18-8 nylon insert locknuts have a higher corrosion resistance than Grade 8, Grade C, or Zinc alternatives
• These are often used around chemicals or saltwater, and in applications requiring a clean, polished appearance with long-term durability

1/4-20 SS 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
• Corrosion and scratch resistant, durable when submerged in water or exposed to mild chemicals

Common Uses

• Marine construction, docks, and waterfront structures where vibration resistance and corrosion protection are both required
• Coastal and chemical-exposure environments including outdoor equipment, enclosures, and water treatment facilities
• Exterior mechanical and structural assemblies requiring a clean, polished finish alongside reliable vibration resistance and long-term corrosion protection

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
• Use stainless steel bolts and hardware throughout the assembly to avoid galvanic corrosion when pairing with SS 18-8 components; do not use in high-temperature applications where sustained heat may degrade the nylon insert