In concrete construction, a tube which surrounds a bolt in a concrete wall to prevent the concrete from sticking to […]

In days before commercial flour was readily available, a small building in which flour was sifted.

The enlarged shape which is preformed on one end of a bolt to provide a bearing surface.

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.