The Amphenol BERGSTIK II 67998-250HLF is a 50-position, dual-row, unshrouded male pin header on the standard 0.100" (2.54mm) pitch.
The 0.100" pitch and 0.100" row spacing match the 2.54 mm grid standard. The 50 positions are fully loaded. The 15.0 µin gold plating supports repeated mating cycles.
No official cross-reference or direct substitute from Molex or TE is listed, but the standard 0.100" pitch and 50-position layout mean any unshrouded dual-row header with the same footprint and plating grade is a form-fit-function candidate — verify the mating pin length and post length against your board stack before substituting.