C13

C13 or C-13 may refer to:

Science and technology

• IEC 60320 C13, a polarised, three pole plug used in electric power cables
• Caterpillar C13 Engine, an engine by Caterpillar Inc.
• Caldwell 13 (NGC 457, the Owl Cluster or ET Cluster), an open star cluster in the constellation Cassiopeia
• Carbon-13 (¹³C), a natural stable isotope of carbon
• Malignant neoplasm of hypopharynx (ICD-10 code), a head and neck cancer
• Tridecylic acid, a saturated fatty acid

Military and transportation

• C13 grenade, the Canadian Forces designation for a M67 grenade
• Autovia C-13, a highway in Catalonia, Spain
• HMS C13, a 1906 British C-class submarine
• LNER Class C13, a steam locomotive class

Other uses

• Sauber C13, a 1994 racing car
• 13th century
• C13, in music, a chord with the structure 1 - 3 - 5 - b7 - 9 - 13
• French Defence (Encyclopaedia of Chess Openings code)
• C13 White Lead (Painting) Convention, 1921, an International Labour Organization Convention