The Amphenol BERGSTIK II 86837-430HLF is a 30-position, dual-row, unshrouded board-to-board header on the standard 0.100" (2.54mm) pitch. This is a workhorse signal interconnect for parallel PCB stacking or wire-to-board via a matching receptacle — the unshrouded design keeps the BOM cost low but leaves the pins exposed during mating, so alignment matters on the line.
The 0.100" pitch is the legacy breadboard standard — it matches a wide installed base of receptacles and perf-board layouts, but the 30 positions in two rows mean the board footprint is 15 pins per row, so the mating receptacle must be a 30-position dual-row as well.