H

H-1/H-2 lubricants

halogen

hazard - see health hazard

Hazard Communication Standard

hazardous material

health hazard

heating oil - see fuel oil

heating value - see heat of combustion

heat-set inks

heat of combustion

heat transfer fluid

heat transfer oil - see heat transfer fluid

heat treating oil - see quenching oil

heavy crude naphtha - see naphtha

heavy-duty oil

heavy ends

heavy fuel - see fuel oil

helical gear - see gear

heliocentrism

heptane

high-pressure-injection injury

high-pressure normal phrase liquid chromatography - see chromatography

homogenization

horsepower

hot-dip rust preventive

humidity

hydrated soap

hydraulic fluid

hydraulic system

hydraulic transmission fluid - see automatic transmission fluid

hydraulic turbine - see turbine

hydrocarbon

hydrocarbon (HC) emissions

hydrocracking

hydronium

hydrosulfurization

hydrowaxing - see dewaxing

hydrodynamic lubrication - see full-fluid film lubrication

Hydrofined®

Hydrofining - see Hydrofined®

hydroforming

hydrogenation

hydrogen treating

hydrolytic stability

hydrometer - see specific gravity

hydrophilic

hydrophobic

hydrostatic lubrication - see full-fluid-film lubrication

hygroscopic - see hydrophilic

hypoid gear - see gear