6A (disambiguation)

6A refers to Six Apart, a software company.

6A may also refer to:

• 6A (Long Island bus)
• APP-6A, the NATO standard for military map marking symbols
• Franklin 6A, an engine powering the 1961 Maule M-4 aircraft
• Gemini 6A, a 1965 crewed spaceflight
• HCM-6A, a galaxy found in 2002
• Keratin 6A
  • Precorrin-6A synthase (deacetylating), an enzyme
  • Precorrin-6A reductase, an enzyme
• U.S. Route 6A
• Aviacsa IATA airline designator
• 6A, the production code for the 1982 Doctor Who serial Black Orchid