What are these called ?

[stu2b2]

It’s looks the same both ends

 

[quaddamage]

SMA Barrels, Female-to-Female. They are kind of SMA Reductors. And with even more generalization, these are Coaxial Connectors.

 

[N017RW]

SMA Barrels, Female-to-Female. They are kind of SMA Reductors. And with even more generalization, these are Coaxial Connectors.

It’s important to point out that the pictured adapter is a Reverse Polarity MALE. i.e. RP-SMA(M).

Normally the internally threaded coupling has a center pin not a receptacle,

http://www.taoglas.com/images/produ...TAOGLAS - Reverse Polarity SMA Connectors.pdf

 

[quaddamage]

It’s important to point out that the pictured adapter is a Reverse Polarity MALE. i.e. RP-SMA(M).

Right, I did messed that up. In this world some males do have a hole.