Finished nut and bolt for a metallurgical exhibition, by Walker and Wilson Ltd, Hamilton

Rifle bolt picked up on the retreat from Mons, 1914, given to Sister A.M. Locke, Queen Alexandra's Imperial Military Nursing Service, World War I

Sliding bolt, part of a lock: Yemen, 1970 - 1982

Bolt from the Forth Road Bridge built between 1958 and 1964 - TOXIC coating, only handle with gloves

Cadmium plated bolt tested to destruction, in two parts, from the Forth Road Bridge built between 1958 and 1964