Nuts & bolts are among the most important part of a machinery. Whether an item is big or small, for making its fitting tight and strong, bolts and nuts are required. Bolts are made up of special stainless steel of a distinct grade that has chrome or nickel in high amount. Bolts, screws and nuts are available in other items of metals, steel, brass, plastic, wood etc. Several items could never be imagined without bolts, nuts and screws.
These should be of high and strong quality and their fittings should be tight enough to make the item they form more durable.