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Last updated: April 2026
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Sub Source, Inc.

Rockford, IL
Request Quote (815) 968-7800 Visit Website

Sub Source, Inc. provides metal finishing, coating, and nondestructive testing services from its Rockford, Illinois facility. Its NDT services include liquid penetrant inspection, magnetic particle inspection, and Nital Etch for parts used in aerospace, agriculture, automotive, construction, defense, energy, machine tool, power generation, recreational, and technology sectors. The company was founded in 2000 and is led by President Stan Valiulis.

liquid penetrant inspectionmagnetic particle inspectionnital etchultrasonic testingremote ndt services
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Credentials & Experience

Years of Experience
26+
Certifications
  • NADCAP Nondestructive Testing accreditation
  • NADCAP Aerospace Quality System (AC7004) accreditation
  • ISO 9001:2015 certification

Additional Details

NDT Methods Offered
Ultrasonic Testing (UT)Magnetic Particle (MT)Liquid Penetrant (PT)
Industries Served
AerospaceManufacturingPower Generation
Years in Business
26
Quality System Certifications
ISO 9001NADCAP

Location

600 18th Ave. Rockford, IL 61104

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