Nylon Lock Nuts Metric 12mm

Sold in sets of 50 This type of lock nuts have a layer of nylon insert inside of the nut, when you put the bolt through, it starts to thread the nylon, then it puts pressure on the screw and prevents it from vibrating loose and even falling off. The nylon insert nut features an internal nylon washer or patch, the addition of non-metal material makes the nut is more sensitive to temperature and chemicals. To install the nylon insert lock nuts, a tool is required.