Nylon insert locknut is a kind of nut with nylon collar insert to resisting turning. Nuts are widely used in conjunction with a mating bolt to fasten two or more parts together. Its inner diameter might be slightly smaller than the major diameter of the screw. Then nylon insert locks the nut by friction against the screw under the applied radial compressive force. The high quality 304 stainless steel provide perfect strength and good corrosion resistance in bad environments like high temperature, cold weather and high humidity areas without the need for time consuming and costly maintenance.