It uses a standard 0.100" (2.54 mm) pitch on both the pin-to-pin spacing and the row-to-row spacing, so it drops onto a 0.100" grid footprint without layout surprises. All 50 positions are loaded — no skipped contacts to track.
The overall contact length is 1.040" (26.42 mm), with a mating pin length of 0.820" (20.83 mm) and a solder-tail length of 0.120" (3.05 mm). Black insulation is the default colour — no colour-coding option for keying on this unshrouded member.
The 87901-450HLF sits at 50 positions in the dual-row, unshrouded, straight through-hole variant of the BERGSTIK II family. The closest sibling in the same format is the 87901-451HLF — same pitch, same dual-row layout, same tin finish, but the position count differs. The 50-position version matches a 50-circuit BOM line; the 451 variant serves a different circuit count. No other functional difference between them — the selection is purely the position count against the harness or PCB circuit count.