The Hazard Characteristic Code (HCC) designation for DOT Combustible Liquid, OSHA IIIA. Hazard Group & Comments: Any product that does not meet the definition of any other hazard class or HCC and has a flash point (closed cup) above 141 °F (60.5°C) and at or below 200 °F (93 °C). OSHA Class IIIA items are included in this definition