N connectors have a threaded coupling interface to ensure that it mates correctly. It is available in either 50 ohm or 75 ohm versions. These two versions have subtle mechanical differences that do not allow the two types to mate. This series of connectors follows the MIL-C-39012. The standard versions are specified for operation up to 11 GHz. The connectors are able to withstand relatively high powers when compared to the BNC or TNC connectors. They are used for many radio frequency applications including broadcast and communication equipments.