The FCI 86837-118HLF is an 18-position, dual-row unshrouded header in the BergStik II series, on the standard 0.100" (2.54mm) pitch. The 0.100" pitch and 0.100" row spacing put it on the legacy grid that matches most prototyping boards and ribbon cable transitions.
The 18 positions are fully loaded across two rows — 9 per row — at the same 0.100" pitch and row spacing as the rest of the BergStik II family. The unshrouded design means the pins are exposed; it mates with any standard 0.100" IDC socket or a shrouded header receptacle that accepts 0.025" square pins. The overall contact length is 0.600" (15.24mm), with a mating length of 0.380" (9.65mm) and a post length of 0.120" (3.05mm) — that post length determines how much board thickness it can clear on the solder side.