KK 254 Bottom-Entry Socket Header – What It Is
The 38-00-1394: This is a Molex KK 254 PC Board Connector, bottom-entry female socket header – the receptacle half that mates with a KK 254 pin header on the board. The 'bottom-entry' orientation means the mating face is on the underside of the connector body, designed for through-hole solder termination to the PCB. It's part of the broad KK 254 family, which uses 2.54 mm pitch spacing and accepts standard KK crimp terminals.