12197 verified suppliers listed

Best NDT Companies in California

California's NDT market spans two distinct but equally demanding sectors: aerospace and defense inspection concentrated in the Los Angeles Basin and San Diego, and industrial inspection serving the state's refineries, petrochemical facilities, and aging infrastructure. Aerospace NDT companies in California serve Boeing, Northrop Grumman, Raytheon, SpaceX, and hundreds of Tier 1 and Tier 2 suppliers requiring Nadcap-accredited NDT for flight-critical structure, engine components, and composite assemblies. Industrial NDT companies serve the Bay Area and Southern California refinery corridor, performing API inspection and corrosion monitoring. Both sectors demand rigorously certified technicians and documented inspection procedures.

Why these suppliers?

  • California's aerospace NDT market — centered on the LA Basin and San Diego — demands Nadcap accreditation, AS9100 integration, and ITAR compliance for inspection of flight-critical metallic and composite structures.
  • Southern California's refinery corridor and Bay Area industrial facilities generate consistent demand for API 510/570 inspection, corrosion monitoring, and fitness-for-service assessments.
  • California's size and industrial diversity mean NDT companies here have invested in the full range of advanced methods — PAUT, TOFD, digital radiography, and automated UT systems — giving buyers access to the latest inspection technology.

1475 verified suppliers found

San Jose, California

Improve your manufacturing with reliable machining services and cost-saving solutions. Discover how Process Optimization and Engineering can help your business.

+1 408-849-3576Website
Santa Fe Springs, California3.7(3)

Machine Tool Factory, Inc. is a machine tool company in Santa Fe Springs, CA that offers a variety of services. Whether you need repairs or rebuilds, you can rely on our team to provide the assistance you need. Do not hesitate to get in touch with us today for additional information.

+1 562-944-3334Website
Lake Elsinore, California4.3(73)

Buy & sell top-quality used CNC machines at MachineStation. Best used CNC machines & equipment for sale in the USA from top manufacturers like Mazak, Haas, DMG, Doosan & more.

+1 909-919-9600Website
Northridge, California

MachineWorks Manufacturing produces high-quality machined metal components for the aerospace, space, defense, and commercial industries through CNC Machining.

+1 818-527-1327Website
San Diego, California

Discover our precision CNC machining services, designed for accuracy and efficiency in every project. Trust us for all your CNC manufacturing needs.

+1 858-215-1835Website
Los Angeles, California1.0(2)

Explore high-quality, pre-owned industrial machinery with Machnet – your trusted source for over 30 years. Discover a wide range of CNC machines, milling equipment, sheet metal tools, and more from leading brands. Buy or sell used machinery with confidence, backed by our commitment to client

+1 310-909-2020Website
Valencia, California4.6(52)

Mamo Motorsports Chevy LS, BBC & SBC performance products are engineered for your specific vehicle. We design and manufacture custom cylinder heads, intake manifolds, throttle bodies and more, delivering the most reliable top end engine builds that make the most power. Trust Mamo - get #mamofied!

+1 661-714-1317Website
San Leandro, California5.0(4)

M.A.R.’s Engineering has provided precision screw machine products, prototyping, and full manufacturing services since 1964.

+1 510-483-0541Website

Frequently Asked Questions

What NDT certifications are required for aerospace inspection in California?
Aerospace NDT in California typically requires Nadcap accreditation for the specific NDT methods being performed — particularly RT, UT, MT, PT, and ET. Individual technicians should hold NAS 410 or ASNT Level II/III certification. Many prime contractors and Tier 1 suppliers require technicians to be qualified under the customer's specific written practice, not just a general standard. ITAR registration may also be required for defense programs.
Do California NDT companies serve both aerospace and industrial clients?
Many larger California NDT companies serve both sectors, but it is common for companies to specialize. Aerospace NDT labs often focus exclusively on flight hardware and maintain Nadcap accreditation, while industrial inspection companies focus on API work, in-service inspection, and structural assessment. When sourcing, confirm that the company's written practice, certifications, and equipment are qualified for your specific application — aerospace and industrial procedures are governed by different codes and standards.
How do I find a Nadcap-accredited NDT company in California?
The Performance Review Institute (PRI) maintains the official Nadcap accredited supplier database at pri-network.com. You can search by commodity (NDT), country, and state to find currently accredited California companies. Nadcap accreditation is commodity-specific — confirm the accreditation covers the NDT method (RT, UT, MT, PT, ET, etc.) you require for your parts, not just a general NDT accreditation.

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