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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

AG Machine Shop
Van Nuys, California5.0(1)
+1 818-988-4858
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AGA Precision Systems LLC
Santa Ana, California

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

AS9100 Rev D
(254) 535-2419Website
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Aimco Engineering
Irvine, California5.0(1)
+1 949-509-7200Website
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AIRCRAFT QUALITY METALS, INC
Tustin, California

9100 (9001:2015) certified. Certification body: Bureau Veritas Certification NA. Structure: Single Site.

AS9100 Rev D
1 (714) 669-2902Website
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Airpoint Precision Inc.
Diamond Springs, California5.0(2)
+1 530-622-0510Website
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AJ Solutions Machining
Fremont, California5.0(11)

Machine shop Fremont CA - AJ Solutions Machining CNC Milling Machine Shop router & Plastic Fabrication in Fremont CA, machine shop near me

+1 510-270-8036Website
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AKA MACHINING
Simi Valley, California5.0(1)
+1 805-433-2004Website
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Al Hubbard Machine Shop
Hayward, California4.5(11)
+1 510-537-1885
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AL Industries, Inc.
Santa Ana, California

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

AS9100 Rev D
Website
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AL'S WIRE EDM, LLC.
Banning, California5.0(1)

Wire EDM

+1 909-553-8404Website
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ALC Machine Inc
Santa Rosa, California4.8(22)
+1 707-542-3533Website
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Alex Machine Shop
Redwood City, California5.0(2)
+1 650-367-0110
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Alex Machining Corp
San Diego, California

We are a high precision CNC Milling and Turning Machine Shop located in San Diego.

Website
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Alexanders Precision Machining
Huntington Beach, California3.0(2)

Alexander

+1 714-899-9003Website
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Algeb CNC Machining
Oxnard, California
+1 805-487-7638Website
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All American Semiconductor MachiningVerified
Sunnyvale, California

CNC machining for semiconductor equipment. Ultra-clean machining of aluminum and stainless steel. ISO 9001 certified.

ISO 9001
(408) 727-1500
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ALL COUNTY MACHINE TOOL LLC
Hawaiian Gardens, California5.0(7)
+1 562-468-7071
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All New Stamping Company
El Monte, California

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

AS9100 Rev D
(800) 877-7775Website
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All Size Machinery Equipment
Fontana, California
+1 909-854-5997
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All Valley Industrial Services Inc. & Roberts and Son Machine Shop
Visalia, California5.0(3)
+1 559-733-2088Website
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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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