T31 or T.31 may refer to:

• Aero Country Airport, in McKinney, Texas; FAA airport code T31
• General Electric T31, an American turboprop engine
• German torpedo boat T31
• Komagawa-Nakano Station, Higashisumiyoshi-ku, Osaka, Japan; Osaka Metro station code T31
• Slingsby T.31 Tandem Tutor, a British military training glider
• T31 cannon, an aircraft weapon
• Type 31 frigate, a planned class of frigates for the Royal Navy

Topics referred to by the same term

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