AMPLIMITE D-Sub Connector .050 Series III Receptacle PCB Headers with ACTION PIN Contacts AMPLIMITE .050 series III Receptacle PCB vertical mounting Headers with a 1.27mm centreline and preloaded with ACTION PIN contacts that are compatible with SCSI-2, SCSI-3, EIA RS-232, IPI-2 and HIPPI standards. When these ACTION PINS are inserted into the PCB hole, two spring members are compressed which then exert force against the hole resulting in a gas tight connection. The housings of these AMPLIMITE .050 series III ACTION PIN PCB Headers are made from black, SMT compatible 94V-0 rated thermoplastic with a bright tin over copper plated shell and nickel over copper plated zinc bracket. The ACTION PIN contact tails of these AMPLIMITE .050 series III PCB Headers are 4.39mm in length for mounting on PCBs with a nominal thickness of 1.56 to 2.36mm.