Hussmann 0539743

SCREW SOCKET RETAINER BLACK

A retainer is a mechanism that positions, as a device, frame, or groove that restrains, holds in place, or guides.  A retainer may be also be a clip, bracket, or similar component that prevents a part within a machine from moving.

A screw is a type of fastener, in some ways similar to a bolt typically made of metal, and characterized by a helical ridge, known as a male thread (external thread). Screws are used to fasten materials by digging in and wedging into a material when turned, while the thread cuts grooves in the fastened material that may help pull fastened materials together and prevent pull-out.

A screw drive is a system used to turn a screw. At a minimum, it is a set of shaped cavities and protrusions on the screw head that allows torque to be applied to it. Usually, it also involves a mating tool, such as a screwdriver, that is used to turn it. Other examples include Phillips head screws and screwdrivers, and Allen hex screws and wrenches.

In restaurant equipment design, sockets are common engineering elements. In general, sockets are receptacles for matching parts, tools, and components. They may serve only for mounting purposes, or they may be used to form connections and provide a source of power.