F37 may refer to:F37, a type foundry, based in Manchester, UK.* HMS Kelvin (F37), a UK Royal Navy K-class destroyerHMS Jaguar (F37), a UK Royal Navy Leopard-class anti-aircraft frigate INS Beas (F37), an Indian Navy Brahmaputra-class frigate Parflange F37, a flange connection for hydraulic tubes and pipes