B39 or B-39 may refer to:
*
Bundesstraße 39, a German road
*
B39 nuclear bomb
*
XB-39 Superfortress
The Boeing XB-39 Superfortress was a United States prototype bomber aircraft, a single example of the B-29 Superfortress converted to fly with alternative powerplants. It was intended to demonstrate that the B-29 could still be put into service ...
*
Soviet submarine B-39
''B-39'' was a Project 641 () diesel-electric attack submarine of the Soviet Navy. The "B" (actually " Б") in her designation stands for большая (''bolshaya'', "large")—Foxtrots were the Soviet Navy's largest non-nuclear submarines.
...
, a Foxtrot class submarine
*
HLA-B39, an HLA-B serotype
*
B39 (New York City bus)
The Metropolitan Transportation Authority (MTA) operates a number of bus routes in Brooklyn, New York (state), New York, United States; one minor route is privately operated under a city government-granted monopoly, franchise. Many of them are th ...
{{Letter-NumberCombDisambig