Machine shops and fabricators in Ontario, California
EveryJobShop lists 10 manufacturing companies in Ontario, California. The most common processes are CNC milling (8), CNC turning (8), assembly (4), press brake bending (2). 5 of them state ISO 9001; certifications on file: ISO 9001 (5), ITAR (4), AS9100 (3). Materials named on their websites: aluminum (7), plastics (5), stainless steel (5), carbon steel (5). 4 are ITAR registered or state defense work.
Filter these 10 shopsUpdated October 15, 2026
Questions buyers ask about Ontario
- How many job shops are there in Ontario, CA?
- EveryJobShop lists 10 manufacturing companies in Ontario, California. The most common processes are CNC milling (8), CNC turning (8), assembly (4), press brake bending (2). Updated October 15, 2026.
- Which Ontario shops are AS9100 or ITAR?
- 5 of them state ISO 9001; certifications on file: ISO 9001 (5), ITAR (4), AS9100 (3). 4 are ITAR registered or state defense work. Filter the list by certification to see them.
- How do I get a quote from a shop in Ontario?
- Open the company page and use "Request a quote": attach STEP, DXF or PDF files, the request goes to the shop's quoting contact with your email as reply-to, and the shop answers you directly.