The SMP-MSLD-PCS-16: It's a single-port surface-mount connector with a gold-plated brass body and a limited detent mating feature — that detent gives you a positive snap-on feel when you push it home, but it's designed to unmate with less force than a full-detent version, which matters when you're swapping modules on a test board or a radio card.
Board Layout Notes for the SMT Footprint
The gold body finish and solder shield termination mean the outer conductor connects directly to the board ground — no separate ground pin to route. The limited detent feature means the connector will stay mated under moderate vibration, but it's not a full-lock design; if your application sees heavy shock, a full-detent or threaded SMP variant might be a better fit.