PC104 Connectors 3M PC104 Connectors feature a simple contact design to accommodate many standoff heights, including standard PC104 pin-and-socket connectors with rugged and reliable 64- and 40-contact male/female headers. The 2.54mm pitch PC104 connectors are available as primary connectors specified by PC/104: 8-bit J1/P1 and 16-bit J2/P2 in both stack-through and non-stack-through options.