Fire hose coupling is the crucial connector attached to the end of a fire hose that allows it to be connected to a water source (like a hydrant or pump), another hose to extend its length, or a nozzle.
Fire hose coupling is the metal fitting attached to the end of a fire hose, allowing multiple hoses to be connected together (to extend length) or to be connected to other equipment like hydrants, fire pumps, nozzles, and monitors.
British Coupling is not a specific brand or model of coupling, but refers to the threaded quick couplings used in British standard fire hydrants, fire hoses and fire truck pump systems.