PTR Hartmann Headers - Sockets Socket housing cable 621254 - PTR 51100040001E, The PTR Hartmann socket housing cable features 4 pins with a contact spacing of 5.08 mm. It is suitable for electrical connections requiring secure and efficient interfacing. This product is typically used in electronic and industrial applications for reliable connectivity. PTR Hartmann 51100040001E AK(Z)1100 Socket Housing 4 Pins 5.08mm Spacing