Aug 112013

SMA connectors can mate with  2.92mm and & 3.5mm RF connectors:  SMA connectors have the same female thread size as  2.92mm, and also have the same male-pin diameter as 2.92.

Mating of SMA connectors with  2.92mm and & 3.5mm RF connectors should be done carefully:  A damaged or out of spec SMA can damage a 2.92 or 3.5.  With SMA, the pin engages first, the threads second.  For 2.92’s & 3.5’s  the opposite: Threads mate first, pins second.  For very precise measurements, connecting different types of connectors results in a small but measurable discontinuity.