Bolt is a piece of metal rod, whose one end is unsettled and other end, is threaded. Nut is the item, which rolls on these threads. Nuts and bolts are usually used at the same time: the bolt is insert...

Bolt is a piece of metal rod, whose one end is unsettled and other end, is threaded. Nut is the item, which rolls on these threads. Nuts and bolts are usually used at the same time: the bolt is inserted through a hole drilled in each item to be fastened together, and then the nut is threaded onto the bolt from the other side and tightened, to give a strong connection..