Nylon insert lock nut (nyloc nut)

Nylon insert lock nut (nylon nut / nyloc nut)

A nylon insert lock nut is a type of hex nut with a nylon ring inserted at the top of the internal thread. The smaller inner diameter of the nylon insert is compressed against the bolt thread when tightened, generating friction that prevents loosening and self-backoff.

It is characterized by minimal damage to the bolt threads and relatively stable locking performance even after repeated use.

Classification by height:

• Type 1 (high type)
• Type 2 (low type)

Applicable standards:

• DIN 982 (high type), DIN 985 (low type)
• ANSI/ASME B18.16.6 (high and low types)
• ISO 7040 (high type), ISO 10511 (thin type), ISO 10512 (high type – fine pitch)
• GB 6182 (high type), GB 889.1 (low type), GB 6172.2 (thin type), GB 889.2 (high type – fine pitch)