Bolts

Bolts are externally threaded fasteners with a precision threading that is designed to be mated with a nut or into a pre-tapped hole. Bolts are generally designed to be torqued/tightened by the nut, while screws are typically meant to be torqued/tightened by the head. Bolts are available in a wide range of materials and material grades that greatly influences the load bearing capacity of the fastener.