Analysis
NAICS 3327 is the 2022 industry group for machine shops; turned product; and screw, nut, and bolt manufacturing, part of 332 (Fabricated Metal Product Manufacturing). Census lists 22 example activities under it in the official index.
By establishments it ranks 1st of the 9 codes at this level within Fabricated Metal Product Manufacturing, with 40.5% of them.
County Business Patterns counts 21,774 US establishments in this code in 2023, employing 363,533 people at an average annual payroll of $64,201 per employee (41st percentile of national industries). 41% of the establishments have fewer than five employees, which is close to the national mix.
Across its national industries Census lists 22 index entries; typical ones are automotive machine shops, precision turned product manufacturing and bolts, metal, manufacturing.
Its goods appear in 65 statistical lines of the US tariff schedule, mostly under headings 7318 (screws, bolts, nuts, coach screws, screw hooks, rivets…), 7415 (nails, tacks, drawing pins, staples (other than those of…) and 7616 (other articles of aluminum). That link is how import data is matched to domestic producers, for example in trade-remedy cases.
It splits into 2 more detailed codes. The largest by establishments is 33271 (Machine Shops) with 17,156.
Official definition
This industry group comprises establishments primarily engaged in one of the following: (1) operating machine shops primarily engaged in machining metal and plastic parts and parts of other composite materials on a job or order basis; (2) machining precision turned products; or (3) manufacturing metal bolts, nuts, screws, rivets, and other industrial fasteners.
Source: US Census Bureau, NAICS 2022 Manual.
Index entries (22)
- Automotive machine shops
- Precision turned product manufacturing
- Bolts, metal, manufacturing