sma connector attenuation

dear all

anyone know the approximation value (dB) of a gold sma connector attenuation? i mean in the worst case.
how bad the attenuation due to discontinuity caused by an imperfect soldering in mounting connector to microstrip ?

thanks for all

All about SMA connectors:
http://www.rfconnector.com/pdf/cat-sma-series.pdf
DrWhoF