STAINLESS STEEL NYLON INSERT NUTS

Nylon Insert Nuts – FAQs

What is a nylon insert nut?

A nylon insert nut is a hexagonal nut containing a nylon locking insert at the top of the nut. When the nut is threaded onto a bolt, the nylon insert deforms around the threads, creating increased friction that helps resist loosening under vibration.

These nuts are commonly referred to as nyloc nuts.

How do nylon insert nuts work?

The nylon insert provides a prevailing torque by gripping the threads of the bolt. This resistance to rotation helps prevent the nut from loosening due to vibration or movement, without causing damage to the threads of the mating fastener.

When are nylon insert nuts typically used?

Nylon insert nuts are commonly used:

• In applications subject to vibration or movement
• Where a self‑locking fastening solution is required
• In automotive, machinery, and general engineering assemblies
• Where additional locking devices such as spring washers are not desired

They are suitable for many static and dynamic applications when used within their operating limits.

Are nylon insert nuts suitable as a primary fastening nut?

Yes. Nylon insert nuts are suitable for use as primary fastening nuts, provided they are correctly selected for the application. The nylon insert provides a locking function, while the nut body carries the mechanical load.

Can nylon insert nuts be reused?

Nylon insert nuts may be reused, provided the nylon insert still provides sufficient resistance to rotation. Repeated installation will reduce the effectiveness of the nylon insert, and the nut should be replaced if the prevailing torque is significantly reduced.

Are nylon insert nuts suitable for high‑temperature applications?

No. Nylon insert nuts have temperature limitations due to the nylon insert. They are not suitable for applications where high temperatures could cause the nylon to soften or degrade. For elevated‑temperature environments, alternative locking methods should be considered.

What sizes and thread types do you supply?

We supply nylon insert nuts in:

• Metric thread sizes
• Inch thread sizes

Availability of sizes may vary depending on material.

What materials are available?

Our range of nylon insert nuts is available in:

• Stainless steel A2
• Stainless steel A4

These materials are supplied in both metric and inch thread forms.

Are nylon insert nuts known by any other names?

Yes. Nylon insert nuts are also commonly referred to as:

• Nyloc nuts
• Nylon lock nuts
• Nylon locking nuts

All terms describe the same nut design using a nylon insert to resist loosening.

How do I choose the correct nylon insert nut?

When selecting a nylon insert nut, consider:

• Thread size and thread type (metric or inch) to match the bolt
• Operating temperature, ensuring it is suitable for a nylon insert
• Vibration levels in the application
• Material selection (A2 or A4) based on environmental conditions