The Amphenol FCI 68405-154HLF is a 54-position, dual-row unshrouded header from the BERGSTIK® II series, on the standard 0.100" (2.54 mm) pitch. It is a board-to-board interconnect — a male pin header meant to be soldered into a PCB and mated with a matching receptacle. The housing is black glass-filled polyester rated UL94 V-0.
The 0.100" (2.54 mm) pitch and 0.100" (2.54 mm) row spacing define the board footprint — a standard grid that matches decades of legacy layouts. The right-angle through-hole termination means the solder tails are 0.095" (2.41 mm) long, which sets the through-hole drill depth and the wave-solder exposure time.