Acyl-ACP thioesterase involved in the production of fatty acids and beta-keto fatty acids (By similarity). May play a role in cuticular wax synthesis (By similarity). Mostly expressed at low levels in glandular trichomes (lupulin glands), and, to a lower extent, in stems, leaves, flowers and cones. Belongs to the 4-hydroxybenzoyl-CoA thioesterase family.