As with the majority of connectors, adapters, and plugs/sockets, RF adapters can also be classified by gender. Both male and female RF connectors are available, so it is important to choose the right type for your application.
Female RF connectors are the type which features the pin, also referred to as the plug. Conversely, an RF connector male type features a hole where the pin on female connectors can be attached to join two separate components together. Male RF connectors are also known as jacks.
This may sound a little confusing, as plugs are usually male and jacks are typically female. However, with RF connectors, it should also be noted that the male housing normally sits inside the female housing when the two are attached, hence the designated genders.
As an example, this BNC connector has a pin so therefore, it is a plug. However, the mating half (this connector, for instance) fits inside so it would usually be considered the female. This leaves you with a female plug and a male jack or socket.