Nut (hardware)

Square nuts, as well as bolt heads, were the first shape made and used to be the most common largely because they were much easier to manufacture, especially by hand.

In 1851 the Great Exhibition of the Works of Industry of All Nations was to be held in Hyde Park, London, England, and it was decided to build the Crystal Palace as part; this had to be done in 190 days, and at reasonable cost.

The construction firm responsible, Fox Henderson, decided to use nuts and bolts, but to use standardised sizes, a revolutionary method at the time.

[2] There is a wide variety of nuts, from household hardware versions to specialized industry-specific designs that are engineered to meet various technical standards.

For example, wrench sizes of fastener used in Japanese built cars comply with JIS automotive standard.

The chosen material undergoes heating to make it more malleable, followed by forming or forging processes to create the basic shape of the nut.

Quality control checks are performed throughout the manufacturing process to ensure that the nuts meet industry standards and specifications.