Hillman The Group 2992 51618Inch Stop Nut 10Pack

Nylon Insert Lock Nuts have a captive undersized nylon washer that creates friction with the mating threads to prevent loosening, Helps resist the effects of vibration and other forces, Stainless steels are used for their corrosion resistance, high-temperature strength, scaling resistance, and low-temperature toughness, Country of Origin: China