A nut is a fastening tool with a threaded hole and needs to be used with a bolt. The hole contains ‘female’ threads that correspond to the ‘male’ threads of a bolt or screw. The most common nuts come in hexagonal shapes, which makes them easy to use with tools. Square nuts are also used but less often. Different locking mechanisms are used to prevent the nuts from loosening their grip. Some of these mechanisms can be washers, jam nuts, locking fluid, and more. These are hexagonal, winged, cap nit, expansion, split, and T-nut and perform different anchoring roles. These can be used to fasten plastic, wood, masonry, metal surfaces, and even two objects together.