General

In an electrical circuit, a type of knife-blade switch having jaws into which the knife blades fit under heavy pressure […]

A bolt having a fixed head, but no threads or nuts; intended for a subsequent threading operation.

A low single post, or one of a series, usually stone, set to prevent motor vehicles from entering an area.

A large tub used to slake high-calcium or magnesium quicklime to form a lime putty.

A medium-hardness steel which is rolled into plates 0.25 in. (0.6 cm) to 1.5 in. (3.8 cm) thick; used in

Metal from the inner surfaces of a boiler which decomposes and flakes off (in much the same manner as rust