NAICS Code for Machine Shops (332710) | Industry Guide
The NAICS code for machine shops is 332710 – Machine Shops. This classification includes establishments primarily engaged in machining metal and plastic parts to customer specifications using machine tools such as lathes, mills, grinders, EDM, and CNC equipment.
If “machine shop” is in the company name, confirm the primary activity is machining (material removal / precision part production), not stamping, casting, or structural fabrication.
Official code detail reference: NAICS 332710 – Machine Shops
What qualifies as a machine shop?
Machine shops are manufacturing establishments that produce parts by removing material from metal or plastic workpieces using machine tools. Many machine shops operate CNC equipment and produce custom components to customer drawings/specifications.
Common machine shop activities
- CNC milling and turning
- Grinding, boring, drilling, tapping
- EDM (wire/sinker) when part of machining operations
- Prototype, short-run, and job shop production
- Contract machining to customer specifications
Typical outputs
- Precision metal or plastic components
- Custom machined parts for OEMs and MRO
- Fixtures/components used in larger assemblies
- Low-to-mid volume parts with tight tolerances
Classification is based on the primary establishment activity—not the industries served.
Establishment-level rule: If a company has multiple locations, classify each location by what is primarily performed at that address (e.g., machining shop vs sales office vs distribution).
What does NOT fall under NAICS 332710?
Not all metal fabrication or manufacturing businesses are classified as machine shops. If another activity is primary, choose the more appropriate NAICS.
View common “not 332710” examples (related classifications)
| If the establishment primarily does… | Common NAICS | Why it’s different |
|---|---|---|
| Metal stamping | 332119 | Forms metal using dies/presses rather than machining material removal |
| Foundries / casting | 3315xx | Primary output is cast parts; machining may be secondary/finishing |
| Structural metal fabrication | 332312 | Fabricates structural components (often welding/cutting/assembly) |
| Tool & die / special tools | 333514 | Primary output is tool/die manufacturing (specialized tooling) |
⚠️ Common misclassification: choosing 332710 for any metal shop.
If stamping, casting, structural fabrication, or tool/die manufacturing is the dominant activity, use the more specific code.
Quick mapping table (what you do → common classification)
| Search / business description | Typical NAICS | Notes |
|---|---|---|
| CNC machine shop, job shop machining, custom parts | 332710 | Machining is the primary output (material removal / precision parts) |
| Precision machining / prototype machining | 332710 | Commonly 332710 if machining is the dominant activity |
| Tool & die shop, dies, jigs, fixtures (primary output) | 333514 | Tool/die manufacturing is a different primary activity |
| Metal stamping / presswork | 332119 | Stamping is forming, not machining as primary |
| Structural steel fabrication / welded structural components | 332312 | Fabrication/assembly is primary |
How to choose the correct classification
- Confirm the primary activity: machining operations (turning, milling, grinding, EDM) produce the core output.
- Check for a more specific primary output: stamping, casting, structural fabrication, or tool/die manufacturing may override.
- Use the establishment rule: classify each location by what is primarily performed at that address.
- Be consistent: when a business does multiple activities, assign the dominant activity (largest share of revenue/work).
Machine shops industry overview
Machine shops serve aerospace, automotive, defense, medical devices, industrial equipment, and energy supply chains. Many operate as contract manufacturers producing custom components and assemblies.
- Often equipment-intensive operations (CNC mills, lathes, grinders, EDM)
- Common quality frameworks (ISO, AS9100, IATF) depending on customer base
- Frequently regional, with mixed prototype + production workloads
Applied uses of NAICS 332710
- Supplier discovery and industrial targeting
- CNC equipment, tooling, and consumables prospecting
- Government contracting classification and vendor onboarding
- Manufacturing benchmarking and industry rollups
- Insurance underwriting segmentation
Machine shop business lists (NAICS 332710)
SICCODE.com maintains business data for establishments classified under NAICS 332710 – Machine Shops. This section is provided for users who need verified targeting for sourcing, sales, research, and outreach.
- Filters: geography (state/county/ZIP), employee size, revenue range
- Contacts: executive and operations titles where available
- Delivery: CSV / Excel formats and structured integration options
For purchasing information, visit: Buy Business List.
FAQ
- What is the NAICS code for a machine shop?
The NAICS code for machine shops is 332710 – Machine Shops. - Are CNC shops classified differently?
No. CNC machine shops typically use NAICS 332710 if machining is the primary activity. - Are machine shops considered manufacturing?
Yes. Machine shops fall within NAICS Sector 33 – Manufacturing, within fabricated metal product manufacturing. - How do I classify a shop that both fabricates and machines parts?
Classify by the dominant activity at that location (largest share of revenue/work). If machining is primary, 332710 is commonly appropriate; if fabrication/assembly is primary, another fabricated metal code may apply.
Citation
Use this format if you need to cite this reference page in documentation or research.
Thank You For Your Request
Your Personal Data Representative will be contacting you shortly.
Trusted By
What Our Clients Say
We needed a full list of companies within a specific SIC code in order to complete some target market analysis. SICCODE.com provided a comprehensive data set to review and analyze. The delivery was fast and comprehensive. The experience was simple, straightforward, and met our needs - we would recommend.
