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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

PHD Machining LLC
Santa Clara, California5.0(1)
+1 408-903-9106Website
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PHES Machining
Riverside, California5.0(3)
+1 951-312-3881Website
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Phillips Machine & Welding Co.DBA Phillips Aerospace
Brea, California

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

AS9100 Rev D
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Phoenix Group Precision Machining
Corona, California

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

AS9100 Rev D
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Picks Machine
Santa Ana, California4.3(3)
+1 714-662-5797
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PL Machine Corporation
Los Alamitos, California5.0(7)

PL Machine Corporation is a CNC Machine Shop specializing in the manufacturing of tight tolerance parts for the Aerospace, Defense, Space Exploration, Automotive, and Oil and Gas industries. Our core competencies is CNC Mill and CNC Lathe machining.

AS9100 Rev D
+1 714-892-1100Website
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Planetary Machine & Eng Inc
Escondido, California2.3(3)
+1 760-489-5571Website
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PlethoraVerified
San Francisco, California

Online CNC machining service. Upload CAD, get instant DFM and pricing. 3-axis and 5-axis milling plus turning.

ISO 9001
(415) 726-2256Website
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PM Machines
Santa Ana, California4.6(8)

PM Machines has a wide selection of used CNC Machines, Fabrication Equipment, Support Equipment and more from brands such as Brother, Canon, Doosan, HAAS, and more. Visit our site to request a quote today.

Website
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PMS Solution | CNC Machine Shop
Fremont, California5.0(2)
+1 510-552-2143
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PneuDraulics, Inc.
Rancho Cucamonga, California

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

AS9100 Rev D
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PNM Co
Fresno, California4.6(5)
+1 800-851-5608Website
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Poinsett's Machine Shop
Redding, California5.0(1)
+1 530-515-8172
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Polo Machinery
Compton, California
+1 310-537-4981
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Port Machine Shop
Wilmington, California
+1 424-209-5652
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PPC Manufacturing, Inc.
Glendale, California5.0(1)
+1 818-512-3294
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Precision Center Mfg., Inc.
Valencia, California5.0(1)
+1 661-775-9914Website
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Precision CNC Machining Inc
Oxnard, California
+1 805-604-7400Website
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Precision Components
Oxnard, California
+1 805-483-3916Website
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Precision Components Manufacturing Co
Pasadena, California5.0(2)
+1 626-799-0302Website
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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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