F-Type
F-Type connectors are screw on connections used for attaching coaxial cable to devices. In the world of modern networking, F-Type connectors are most commonly associated with connecting Internet modems to cable or satellite Internet provider's equipment. However, they are also used for connecting to some proprietary peripherals.
F-Type connectors have a 'nut' on the connection that provides something to grip as the connection is tightened by hand. If necessary, this nut can be also be lightly gripped with pliers to aid disconnection. Figure 7 shows an example of an F-Type connector.
Figure 7 F-Type connector.