The Amphenol FCI 68405-118HLF is an 18-position, dual-row unshrouded header from the BERGSTIK® II series, on the standard 0.100" (2.54 mm) pitch. It is a board-to-board interconnect, right-angle through-hole mounted, with male square pins terminated by solder.
The 0.100" pitch and 0.100" row spacing are the de facto standard for 2.54 mm grid prototyping and legacy bus architectures — the footprint matches a broad installed base of receptacles and perf-board layouts. The 18 positions loaded all means every pin is present; no selective loading to track. The 0.095" (2.41 mm) post length is short: it clears a standard 1.6 mm board with minimal tail protrusion, but verify it reaches through thicker backplanes or if you plan to solder on the opposite side. For a connector that stays mated once in a production unit, tin would work cheaper; for a test-point or a card-edge that gets swapped quarterly, the gold pays for itself in contact resistance stability.
No official second-source cross-reference is on record, but the BERGSTIK® II footprint is widely second-sourced at the parametric level — confirm pin length and plating grade against your BOM before substituting.