12B is a 2001 Tamil movie. 12B may also refer to: New York State Route 12B, a state highway in the central part of New York Missouri Route 12B Nebraska Spur 12B 12B, a bus route in Chennai WASP-12b, an extrasolar planet HAT-P-12b, an extrasolar planet Boron-12 (12B), an isotope of boron 12B, a short-lived Mazda Wankel engine 12B United States MOS enlisted (military occupational specialty) for "Combat Engineer" See also B12 (disambiguation)