The TE Connectivity Greenpar 3-1478986-0 is an SMA dust cap — a protective cover, not a mating connector. It fits over SMA plugs to shield the interface and centre contact from debris, moisture, and physical damage when the RF line is unmated. The body is machined from brass with a gold finish, matching the corrosion resistance and RF shielding requirements of the SMA interface standard. A chain feature allows tethering the cap to the cable assembly or panel so it stays with the connector during service.
The gold-plated brass body provides a continuous conductive path from the plug's outer conductor through the cap, maintaining shield continuity when the cap is installed. The chain feature is a small loop or attachment point for a lanyard or cable tie, preventing loss during field service.