This U.S. industry comprises establishments primarily engaged in manufacturing glass by melting silica sand or cullet and making pressed, blown, or shaped glass or glassware (except glass packaging containers).

Cross-References. Establishments primarily engaged in--

• Manufacturing flat glass--are classified in U.S. Industry 327211, Flat Glass Manufacturing;
• Manufacturing glass packaging containers in glassmaking operations--are classified in U.S. Industry 327213, Glass Container Manufacturing;
• Manufacturing glass wool (i.e., fiberglass) insulation--are classified in U.S. Industry 327993, Mineral Wool Manufacturing;
• Manufacturing glassware from purchased glass--are classified in U.S. Industry 327215, Glass Product Manufacturing Made of Purchased Glass; and
• Manufacturing fiber optic cable--are classified in U.S. Industry 335921, Fiber Optic Cable Manufacturing.