2pcs SMA Male Plug (Pin) to RP-SMA Female (Pin) Coupling nut Connector

This adapter allows you to connect a cable with a RP-SMA male connector (socket in center, internally threaded nut) to a standard SMA female chassis connector (socket in center, externally threaded barrel).

This is an SMA male to SMA female with a male centerpin. works for 2.4 GHz amplifier to antenna

Kind reminder: RP connector can not match regular connector ,
RP means Reverse polarity. SMA type are with 4 kinds type usually ,
for example :

SMA male is inside screw with plug center,
SMA female is outside screw with hole center,
RP SMA male is inside screw with hole center,
RP SMA female is outside screw with plug center.