HH5 or HH-5 may refer to:

HH5, one of the Hamburger–Hamilton stages in chick development HH5, a model in the series of Honda Acty trucks Flag in Exile, the fifth novel in the Honor Harrington series by David Weber, abbreviated HH5 CHD7, also known as HH5, the chromodomain-helicase-DNA-binding protein 7

See also

H5 (disambiguation)