HK1 (disambiguation)
# HK1 (disambiguation)

HK1 is an enzyme.

HK1 or HK-1 may also refer to:

* HK-1, the original designation of the aircraft Hughes H-4 Hercules
* Heinonen HK-1, a Finnish sport aircraft
* Kimura HK-1, a Japanese experimental aircraft
* (127934) 2003 HK1, a minor planet
