EIA RF Connectors are used to connect two items of high power radio frequency rigid or semi-rigid (flexline) coaxial transmission line.
Typically these are only required in very high power transmitting installations (above 3kW at VHF to MW) where the feedline diameters may be several inches.
The EIA under the Electronic Components Industry Association (http://www.ecianow.org/), are responsible for a number of standard imperial connector sizes.
Peak pulse power handling, driven by voltage breakdown, is more or less frequency independent for any given size (and can be deduced by assuming ~300 V RMS per mm of inner to outer spacing), but the average power, limited by losses heating the centre conductors, increases approximately with the square root of the operating frequency.
Field failures can occur at power levels well below this if the central bullet connections are not making uniform positive contact and free of contamination.