F13

F13, F 13, F.13 or F-13 may refer to:

• F 13 Norrköping, a former Swedish Air Force wing
• F-13 Superfortress, an alternate designation used by the United States Army Air Forces for the B-29
• Junkers F.13, the world's first all-metal airliner
• LSWR F13 class, a 1905 British 4-6-0 steam locomotive model
• Stephen King's F13, a video game

and also :

• f¹³, Family 13, a group of Greek gospel manuscripts
• Friday the 13th, a series of horror films
• Triskaidekaphobia, the fear of the number 13
• a function key labeled F13 on some computer keyboards
• the ICD-10 code for Mental and behavioural disorders due to use of sedatives or hypnotics