2022 NAICS industry in sector 31-33 Manufacturing
33281 Coating, Engraving, Heat Treating, and Allied Activities
NAICS 33281 is the US industry code for coating, engraving, heat treating, and allied activities. It covers establishments primarily engaged in one or more of the following: (1) heat treating metals and metal products; (2) enameling, lacquering, and varnishing metals and metal products; (3) hot dip galvanizing metals and metal products; (4) engraving, chasing, or etching metals and metal products (except jewelry; personal goods carried on or about the person, such as compacts and cigarette cases; precious metal products (except precious plated flatware and other plated ware); and printing plates); (5) powder coating metals and metal products; (6) electroplating, plating, anodizing, coloring, and finishing metals and metal products; and (7) providing other metal surfacing services for the trade.
Official definition
This industry comprises establishments primarily engaged in one or more of the following: (1) heat treating metals and metal products; (2) enameling, lacquering, and varnishing metals and metal products; (3) hot dip galvanizing metals and metal products; (4) engraving, chasing, or etching metals and metal products (except jewelry; personal goods carried on or about the person, such as compacts and cigarette cases; precious metal products (except precious plated flatware and other plated ware); and printing plates); (5) powder coating metals and metal products; (6) electroplating, plating, anodizing, coloring, and finishing metals and metal products; and (7) providing other metal surfacing services for the trade. Establishments in this industry coat, engrave, and heat treat metals and metal formed products fabricated elsewhere. Included in this industry are establishments that perform these processes on other materials, such as plastics, in addition to metals.
When to use a different code
Census classifies these close-sounding activities somewhere else. Businesses mainly engaged in:
- Engraving, chasing, or etching jewelry, metal personal goods, or precious metal products (except precious plated flatware and other plated ware) are classified in Industry 33991, Jewelry and Silverware Manufacturing.
- Engraving, chasing, or etching printing plates are classified in Industry 32312, Support Activities for Printing.
- Both fabricating and coating, engraving, and heat treating metals and metal products are classified in the Manufacturing sector according to the product made.
Codes in 33281
Data last changed November 14, 2026. How this page is built.