This saves z-height in card-edge or mezzanine applications where the mating receptacle comes off the board edge rather than standing above it. The gold layer handles repeated mating cycles without oxide buildup — in a production test fixture cycled weekly, that plating grade supports years of reconnect duty before contact resistance drifts.
Unshrouded Push-Pull Mating and Board Fit
That dimension sets the clearance under a mating receptacle or a card-edge mezzanine board.
Bulk packaging is standard.
The UL94 V-0 housing ensures the connector does not sustain flame in equipment inside an enclosure requiring a flammability rating.