The FCI 86503-152HLF is a 52-position, dual-row unshrouded pin header from the BergStik® II series, on the industry-standard 0.100" (2.54 mm) pitch. This is a through-hole, male-pin board-to-board connector designed for solder termination to a PCB. Overall contact length is 0.470" (11.94 mm), with a 0.250" (6.35 mm) mating length and a 0.120" (3.05 mm) solder post — a standard through-hole footprint that fits common board thicknesses.
This is a standard-production BergStik II part, not a phase-out or surplus item.
The 52-position count and 0.100" row spacing are common across the BergStik II and compatible families — confirm the mating half's position count and pin-out before committing.