Many call these simply SMA Female to N Female adapters and it is true they work for that. However, these also work dandy as a chassis panel replacement for damaged or munged N Female connectors.  Takes a minimum size hole of about 7/16" (max about 5/8") and about 3/8" for the thread going through the panel (not counting the SMA fitting). Nose extends about about 1-1/8" from the panel. Overall length is about 1-3/4".  Nice and new!

These are very high quality connectors or adapters. If it fits hole diameter wise into your instrument but you have a soldered connection, many will either change the backside cable to one using a SMA or add the SMA connector to their cable.

Quantity:  One Connector