0.100" Pitch, 12-Position Dual-Row Receptacle
The 71991-406HLF: It accepts either bottom or top entry mating headers, and the push-pull fastening keeps the connection secure without a locking latch — fine for low-vibration racks but not for a panel that sees constant jostle. The mated stack height is 11.04mm — that is the z-height from the top of the mating header's PCB to the bottom of the receptacle's PCB, so plan the board spacing around that single value, not a range.
Tin Contacts at 78.7µin — Thick Enough for Moderate Cycling
The contact base is phosphor bronze, a standard spring alloy that holds its shape over repeated insertions without taking a set.
Through-Hole Solder, UL94 V-0 Housing
Packaging is tube — not tape-and-reel, so if you are running a pick-and-place line, you will need a tube feeder or a manual load step.