12197 verified suppliers listed

Best Aerospace CNC Shops in California

California is home to one of the largest aerospace manufacturing ecosystems in the world, with suppliers supporting Boeing, Lockheed Martin, SpaceX, and hundreds of Tier 2 and Tier 3 OEMs. These CNC machining shops carry AS9100 certification, signaling a documented quality management system purpose-built for aerospace traceability and defect prevention. Use this list to shortlist suppliers for precision airframe, engine, and structural components.

Why these suppliers?

  • Every shop on this list holds AS9100 certification — the aerospace quality management standard required by most prime contractors and Tier 1 suppliers.
  • California's concentration of aerospace primes means these shops have proven experience with aerospace-grade alloys such as titanium, Inconel, and 7075 aluminum.
  • We verify each listing's certification status, capabilities, and contact information so you can shortlist confidently without lengthy qualification research.

214 verified suppliers found

Camarillo, California

9100 (9001:2015) certified. Certification body: National Quality Assurance, USA. Structure: Single Site.

Website
Van Nuys, California

9100 (9001:2015) certified. Certification body: International Standards Authority. Structure: Multi-Site.

Website
Santa Clara, California

9100 (9001:2015) certified. Certification body: Aviation Suppliers Association dba ASACB. Structure: Single Site.

Website
Placentia, California

9100 (9001:2015) certified. Certification body: SGS North America Inc.. Structure: Single Site.

Irvine, California5.0(1)

Experts in grinding and superfinishing of HVOF coated parts, and are known for high quality service around the world.

+1 937-746-7888Website
Perris, California

9100 (9001:2015) certified. Certification body: Performance Review Institute Registrar. Structure: Single Site.

(951) 940-6444Website
Fremont, California

9100 (9001:2015) certified. Certification body: BSI Group America Inc. Structure: Single Site.

(833) 333-3333Website
Van Nuys, California

9100 (9001:2015) certified. Certification body: Performance Review Institute Registrar. Structure: Single Site.

Santa Ana, California

9100 (9001:2015) certified. Certification body: IAPMO SCB. Structure: Single Site.

(575) 571-1980Website
Rancho Cucamonga, California

9100 (9001:2015) certified. Certification body: IAPMO SCB. Structure: Single Site.

Sylmar, California

9100 (9001:2015) certified. Certification body: IAPMO SCB. Structure: Single Site.

Website
Ontario, California

9100 (9001:2015) certified. Certification body: DNV Business Assurance USA, Inc.. Structure: Single Site.

(275) 487-8781Website
Gardena, California

9100 (9001:2015) certified. Certification body: NSF International Strategic Registrations, Ltd.. Structure: Single Site.

Santa Ana, California

9100 (9001:2015) certified. Certification body: IAPMO SCB. Structure: Single Site.

(714) 708-2613Website
Palmdale, California

9100 (9001:2015) certified. Certification body: IAPMO SCB. Structure: Single Site.

(254) 535-2419Website
Palmdale, California

9100 (9001:2015) certified. Certification body: IAPMO SCB. Structure: Single Site.

Placentia, California

9100 (9001:2015) certified. Certification body: National Quality Assurance, USA. Structure: Single Site.

San Jose, California

9100 (9001:2015) certified. Certification body: National Quality Assurance, USA. Structure: Single Site.

San Diego, California

9100 (9001:2015) certified. Certification body: DNV Business Assurance USA, Inc.. Structure: Single Site.

Santa Clara, California

9100 (9001:2015) certified. Certification body: Amtivo (USA), Inc.. Structure: Single Site.

Frequently Asked Questions

What certifications should an aerospace CNC shop in California have?
For aerospace work, AS9100 is the baseline quality management certification. Many California aerospace shops also hold ITAR registration for defense work, Nadcap accreditation for special processes (heat treat, coatings, NDT), and ISO 9001 as an underpinning system. Always confirm the certification scope covers the specific processes and materials you need.
How do I verify an aerospace CNC shop's AS9100 certification?
Ask the supplier for a copy of their AS9100 certificate, which should show the issuing registrar (such as BSI, DNV, or Bureau Veritas), the certificate number, and the scope of registration. You can cross-check active certificates in the OASIS database maintained by IAQG (International Aerospace Quality Group) at iaqg.org/oasis.
What is the difference between AS9100 and ISO 9001 for CNC shops?
ISO 9001 is a general quality management standard applicable to any industry. AS9100 includes all ISO 9001 requirements plus additional requirements specific to aerospace: configuration management, first-article inspection (FAI), counterfeit parts prevention, key characteristics, and risk management. Most aerospace prime contractors require their CNC machine shops to hold AS9100, not just ISO 9001.

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