1/2 in. Zinc-Plated Nyloc Nut
A nyloc nut also referred to as a nylon insert lock nut, polymer insert lock nut, or elastic stop nut, is a kind of locknut with a nylon collar that increases friction on the screw thread.
A process known as zinc plating is frequently used to protect metals such as iron and steel. It protects against the relentless forces of corrosion. Zinc plating involves the electrodeposition of a thin coating of zinc metal onto the surface of another metal object, known as a substrate.