Analysis
NAICS 3328 is the 2022 industry group for coating, engraving, heat treating, and allied activities, part of 332 (Fabricated Metal Product Manufacturing).
It has only one more detailed code, 33281, which covers exactly the same activities; the definition, index entries and statistics are on that page.
County Business Patterns counts 5,359 US establishments in this code in 2023, employing 120,955 people at an average annual payroll of $59,236 per employee (32nd percentile of national industries). 29% of the establishments have fewer than five employees, which is close to the national mix.
Between 2018 and 2023 the number of establishments fell 5% and employment fell 7%. The 2018 count used NAICS 2017, so part of a large move can come from codes being redefined rather than from businesses opening or closing.
By establishments it ranks 4th of the 9 codes at this level within Fabricated Metal Product Manufacturing, with 10% of them.