The Amphenol ICC 86840-116HLF is a 16-position dual-row unshrouded male header from the BERGSTIK II series, on the industry-standard 0.100" (2.54 mm) pitch. It is a board-to-board interconnect that uses square phosphor bronze pins with a contact length of 0.318" (8.08 mm) on the mating side and a 0.230" (5.84 mm) post for through-hole soldering.
The 0.100" (2.54 mm) pitch and 0.100" (2.54 mm) row spacing are industry standard footprints — you can drop this into a common IC socket pattern or prototype board without layout changes. Fine for a connector that stays mated once assembled, but not the right call if the board sees constant shock or vibration that could unseat the pair.
That geometry saves vertical height inside the enclosure compared to a vertical header.