25pin Ribbon Cable Connector Female IDC Crimping Type Ribbon D-SUB Connector

D-type connectors most commonly consist of two and sometimes more parallel rows of connections. The connectors have a D-format metal shell that provides mechanical strength and limited screening - the metal shells of the plug and socket make contact to provide screening. Panel mounting connectors are typically secured to the panel using nuts that have an additional thread to allow the mating connector to be secured, preventing it from working loose. Free connectors can have backshells that provide screening and can be connected to the cable screen, or if plastic, they provide protection and strain relief.

The pins in common connector types with two rows of pins (9, 15, 25 and 37 way) are spaced approximately 0.108 inch (2.74 mm) apart with rows spaced 0.112 inch (2.84 mm) apart. Higher pin counts and densities can be achieved using more rows of pins.