The FCI BERGSTIK® II 79821-164HLF is a 64-position, dual-row, unshrouded male pin header on a 0.100" (2.54 mm) pitch — a standard board-to-board interconnect for through-hole soldering. It carries a 5 A per contact current rating and a 110 V voltage rating, with the contact finish specified as Gold or Gold GXT™ at 30.0 µin (0.76 µm) on the mating surface. The insulation height sits at 0.100" (2.54 mm), and the overall contact length of 0.730" (18.54 mm) gives a 0.430" (10.92 mm) mating section and a 0.200" (5.08 mm) solder post. This is a straight, unshrouded header with push-pull fastening — typical for mezzanine board stacking where the mating receptacle provides the retention.
What the 64 positions and 0.100" pitch mean for your board
The 64 positions in two rows at 0.100" (2.54 mm) pitch and 0.100" (2.54 mm) row spacing give a 32-per-row layout that matches the standard 0.100" grid. This is a common footprint for backplane or daughtercard headers — the 64 circuits fill a 32-pin-per-row pattern, so the board layout needs a 32-wide through-hole pattern per side with a 0.100" row-to-row offset.