What is a lock nut?

A lock nut, also known as a nylon insert nut or a nyloc nut, is a type of nut that features a nylon insert at the top. The nylon insert is a small, circular piece that is designed to prevent the nut from loosening due to vibrations or torque. As the nut is screwed onto a bolt or threaded rod, the nylon insert grips the threads and provides resistance against loosening.

Lock nuts are commonly used in applications where it is important to prevent loosening, such as in automotive, construction, and machinery industries. They are available in various sizes and materials, including steel, stainless steel, and brass.

When using lock nuts, it is important to ensure that the threads are clean and undamaged, as any debris or imperfections can interfere with the nylon insert and reduce its effectiveness. Additionally, over-tightening a lock nut can damage the nylon insert and make it less effective at preventing loosening.

Overall, lock nuts are a reliable and cost-effective solution for securing fasteners and preventing unintentional loosening in various applications.