2022 NAICS industry in sector 31-33 Manufacturing
32721 Glass and Glass Product Manufacturing
NAICS 32721 is the US industry code for glass and glass product manufacturing. It covers establishments primarily engaged in manufacturing glass and/or glass products.
Official definition
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 from purchased glass.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Manufacturing glass wool (i.e., fiberglass) insulation products are classified in Industry 32799, All Other Nonmetallic Mineral Product Manufacturing.
- Manufacturing optical lenses (except ophthalmic), such as magnifying, photographic, and projection lenses are classified in Industry 33331, Commercial and Service Industry Machinery Manufacturing.
- Grinding ophthalmic (i.e., eyeglass) lenses for the trade are classified in Industry 33911, Medical Equipment and Supplies Manufacturing.
- Manufacturing fiber optic cable from purchased fiber optic strand are classified in Industry 33592, Communication and Energy Wire and Cable Manufacturing.
Codes in 32721
Data last changed November 14, 2026. How this page is built.