N-Type Male to RP-SMA Reverse Polarity Male RF Adapter, CablesOnline RF-S164 

These RF adapters feature an N type male plug on one end and RP-SMA male (inside-threads with a hole ) connector on the other end. They allow you to convert a cable with RP-SMA connector to an N-type connector and vice versa.

Specifications:

CablesOnline Part Number: RF-S164