Mil-Spec Rectangular Connectors

The D-subminiature or D-sub is a common type of electrical connector named for their characteristic D-shaped metal shield. When introduced D-subs were among the smallest connectors used on computer systems.

A Rack and Panel Connector is square or rectangular in shape and is primarily designed to connect the device and the equipment rack. They are often blind mate designs to allow easy installation of avionics program boxes into airframes.