micro D connector
The standardized Sub-D connector has a pin spacing of 1/10", corresponding to 2.54 mm. Due to the ever increasing miniaturization, there are smaller D-shaped connectors, the Micro-D connectors.
In these connectors, the pin spacing has been halved compared to the Sub-D connector to 1/20", corresponding to 1.27 mm. This spacing is also known as half pitch.
Micro-D connectors are designed to withstand the toughest operating conditions and can be usefully employed wherever space saving and miniaturization are the main considerations, such as in aerospace, medical and defense applications.
It is used in multipole versions in SCSI interface and Centronics connections, among others.