A nut is type of threaded fastener with a hole. Nuts are normally used alongside a bolt to tighten multiple parts together. Square nuts similar to square headed bolts were hugely popular in earlier times due to their simple manufacturing process. [readmore]
The popularity of hexagonal nuts is due to the fact that six sides make it easier for a tool to reach the angles. Moreover it only takes one sixth of a rotation to reach every side of the nut. Nuts come in patterns such as a ‘Wing Nut’ with two large metal wings and ‘Cage nuts’ that come with a spring steel cage wrapped around the nut. Wing Nuts are used for applications where tools are inaccessible and nuts required to be tightened with hands. Cage Nuts are used for tightening objects where square holes are punched. Other Nuts include Acorn Nut, Coupling Nut, Barrel Nut, Cross-Dowel, Insert Nut, Flange Nut, T-Nut, Weld Nut and more. Nuts are used for regular household applications to industry-specific applications that require technical standards.