NAICS Code 32721 - Glass and Glass Product Manufacturing
This industry comprises establishments primarily engaged in manufacturing glass and/or glass products. Establishments in this industry may manufacture glass and/or glass products by melting silica sand or cullet, or purchasing glass.
- Manufacturing glass wool (i.e., fiberglass) insulation products: classified in NAICS Code - 32799 - All Other Nonmetallic Mineral Product Manufacturing.
- Manufacturing optical lenses (except ophthalmic), such as magnifying, photographic, and projection lenses: classified in NAICS Code - 33331 - Commercial and Service Industry Machinery Manufacturing.
- Grinding ophthalmic (i.e., eyeglass) lenses for the trade: classified in NAICS Code - 33911 - Medical Equipment and Supplies Manufacturing.
- Manufacturing fiber optic cable from purchased fiber optic strand: classified in NAICS Code - 33592 - Communication and Energy Wire and Cable Manufacturing..
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