Nut, in technology, fastening device consisting of a square or hexagonal block, usually of metal, with a hole in the centre having internal, or female, threads that fit on the male threads of an associated bolt or screw. A bolt or screw with a nut is widely used for fastening machine and structural components
The Machinery's Handbook explains that bolts are used to assemble to unthreaded objects, typically with the use of a nut. In comparison, screws are used to assemble objects with threads. Bolts are typically used to make a bolted joint by using a nut to apply force while using the shank to act as a dowel
Hinge bolts, also known as hinge protectors and hinge reinforcement bolts, are designed to increase the security of your door, to make the vulnerable hinge side of the door as tough as the lock side, on both outward and inward opening doors
