The Amphenol ICC BERGSTIK® II 87900-450HLF is a 50-position, dual-row, unshrouded male pin header on the standard 0.100" (2.54mm) pitch. The square pins are phosphor bronze with tin plating on both the mating surface and the solder tails — the 100.0µin (2.54µm) tin finish on the mating side is suited for moderate-cycle applications where cost per position is a priority over gold's cycle life.
The 0.100" pitch gives enough room for two rows of pins without crowding the board layout, and the 0.100" row spacing keeps the footprint compatible with standard prototyping grids and legacy bus architectures. The overall contact length of 0.940" (23.88mm) with a 0.720" (18.29mm) mating length and 0.120" (3.05mm) post length defines the board-to-board stack height — the mating half must accommodate the pin length for full engagement.
No official cross-reference or successor is on record, so the BOM line should reference this exact order code.