https://www.hasco-inc.com/connectors/sma-connectors/220-511sf-super-sma-jack-female-thread-in-accepts-pin-dia-012/
Southwest Microwave 220-511SF SMA Female Connector Thread-In .390
220-511SF Southwest Microwave connector SMA Female thread-in 27 GHz RF connector with 0.012" Pin socket sparkplug housing connector 50 Ohm
southwest microwavesma femalethread inconnector