F37 may refer to:
*
HMS ''Kelvin'' (F37), a UK Royal Navy K-class destroyer
*
HMS ''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
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