It can be use to convert TV to satellite set-top boxes or convert set-top to antenna.
The F connector is inexpensive, gendered, threaded, compression connectors for radio frequency signals.
It has good 75 O impedance match for frequencies well over 1 GHz and has usable bandwidth up to several GHz.
The female connector has a socket for the central conductor and external threads. The male connector has a central pin, and a captive nut with internal threads.
The design allows for low-cost construction, where cables are terminated almost exclusively with male connectors.