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Shop4Fasteners

Nyloc Nuts

Nyloc nuts, also known as nylon insert nuts, are a popular vibration-resistant fastener. If your application may involve high temperatures or chemicals that are known to damage nylon, use metal locking nuts instead.

Nyloc nuts, also known as nylon insert nuts, contain a nylon ring which has an inner diameter slightly smaller than the major diameter of the thread, causing it to grip the screw or bolt. This feature makes nyloc nuts resistant to vibration loosening. However, the nylon insert is susceptible to degeneration if exposed to high temperatures (120°C+) or some chemicals, such as hydrochloric acid. If you think that these risk factors may apply to your application, it is recommended to use metal locking nuts.