The Amphenol FCI 87900-424HLF is a 24-position, dual-row unshrouded header from the BERGSTIK II series, built for board-to-board interconnect on a standard 0.100" (2.54mm) pitch. It carries all 24 positions loaded with square male pins in a through-hole solder termination — the 0.120" (3.05mm) post length suits standard PCB thicknesses.
The 0.100" (2.54mm) pitch and 0.100" (2.54mm) row spacing match the legacy 0.100" grid — the same footprint as a standard DIP package, so board layout is straightforward with existing libraries. The 0.720" (18.29mm) mating pin length gives good wipe depth into a standard box or friction-lock receptacle, and the 0.120" (3.05mm) solder post clears most 1.6mm PCBs with room for a wave solder fillet. For applications with vibration or cable strain, a secondary retention method (board locks on the receptacle side or a wire-to-board housing with a latch) is worth planning into the assembly. The 100.0µin tin mating finish handles moderate mating cycles — typically 50 to 100 cycles before fretting becomes a concern — so this header is a good fit for internal connections that are mated once or infrequently serviced.