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By certification 
Jiangsu Zhenya Special Screw Co.,Ltd is one of the leading China nylon lock nut manufacturers and suppliers, as a professional company, our productive factory is able to produce CE certification nylon lock nut at both high quality and low price. Welcome to buy discount and cheap, or wholesale products from us.
Nylon insert lock nuts are hex nuts that have a captive nylon washer mounted in their top to create a prevailing torque type lock nut. The undersized washer forms a compression grip that binds on the threads of the mating fastener to resist loosening. Due to limitations of the non-metallic insert, the nuts cannot be used at elevated temperatures or with certain chemicals but the nylon washer does provide a gas and moisture seal. Various colors of nylon are used. Nylon insert lock nuts are also known as: aircraft lock nuts, elastic lock nuts, elastic stop nuts, nyloc nuts, nylock nuts, nylon insert stop nuts, stop nuts.
