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boltsclick to hear

Metal plugs ending in a head and threaded so they can be tightly screwed into nuts to secure fastenings and assemblies.
bolts bolt nut head shoulder bolt threaded rod shoulder

bolt click to hear

Metal threaded plug ending in a head; it is tightly screwed into a nut to secure fastenings and assemblies.

nut click to hear

Hollow cylinder of metal whose lining is threaded to screw onto a corresponding bolt.

head click to hear

Widened end of the bolt, of various shapes and sizes.

shoulder bolt click to hear

Bolt whose head comprises a section of smaller diameter for concentrating the tightening pressure.

threaded rod click to hear

Elongated part whose surface has a spiral protrusion for screwing into a corresponding nut.

shoulder click to hear

Cylindrical nonthreaded protrusion used as a bracket as the bolt is being tightened.