The Amphenol FCI 68031-119HLF is a 19-position, single-row unshrouded male header in the BERGSTIK II series. It uses a 0.100" (2.54 mm) pitch — the standard breadboard-compatible spacing that matches legacy perfboard and common 0.100" receptacles. With all 19 positions loaded, this is a direct BOM match for a 19-circuit board-to-board link.
The 0.100" pitch leaves 2.54 mm between pin centres — enough for a single trace between pads on a standard 1 oz copper board without necking down. The 0.230" (5.84 mm) mating pin length engages fully with standard box headers and socket strips, while the 0.183" (4.65 mm) solder tail gives a solid through-hole joint on 0.062" boards. Overall contact length is 0.513" (13.03 mm), so the header stands off the board by the insulation height of 0.100" (2.54 mm).