What this connector is
The Amphenol FCI 79425-164HLF is the 64-position member of the BERGSTIK II dual-row header series — a 0.100" (2.54mm) pitch board-to-board male header with through-hole solder termination and square pins. All 64 positions are loaded. The contact finish is listed as gold or Gold GXT at 30.0µin (0.76µm) thickness on the mating side, and the contact material is phosphor bronze. Rated 5A per circuit at up to 110V, with an insulation height of 0.100" (2.54mm). The connector carries a UL94 V-0 flammability rating and is packaged in a bag.
Push-pull fastening on an unshrouded header
The push-pull fastening type is the notable detail here — most 2.54mm pitch headers rely on friction fit between the pin and receptacle socket alone. The push-pull mechanism on this variant adds a positive retention step: the header locks into the mating receptacle and requires deliberate pull to disengage. That matters in any application where vibration or cable pull could work a friction-fit header loose over time. The trade-off is that the header remains unshrouded, so it does not carry keying or polarisation features — mis-mate protection depends on the receptacle housing or the board layout footprint.
Plating grade and what it means for the application
What you need to commit before specifying
The 64-position dual-row footprint spans 0.100" × 2 row spacing — verify your board has the routing channels to accommodate a 64-circuit footprint without trace density conflicts. Confirm the mating receptacle carries matching 0.100" pitch and supports the push-pull retention feature; a standard friction-fit socket housing will not engage the retention mechanism.