If you buy precision machined components, you'll see two certifications on nearly every supplier's profile: ISO 9001 and IATF 16949. They sound similar, and they're related — but they are not interchangeable. Choosing a supplier certified to the wrong one (or paying a premium for one you don't need) is a common, avoidable mistake. Here's the plain-English version.

ISO 9001: the universal quality baseline

ISO 9001 (current version 9001:2015) is the world's most widely used Quality Management System (QMS) standard. It certifies that a manufacturer has documented, repeatable processes for controlling quality, handling corrective actions, and continuously improving. It applies to any industry.

For most industrial, electrical, plumbing, and general-purpose components, ISO 9001 is exactly what you need. It tells you the supplier runs a disciplined, audited quality system.

IATF 16949: the automotive layer on top

IATF 16949 is built on top of ISO 9001, adding the stricter requirements the automotive industry demands. It layers in things like:

  • PPAP (Production Part Approval Process)
  • APQP (Advanced Product Quality Planning)
  • MSA (Measurement System Analysis) and deeper SPC
  • Zero-defect mindset and tighter traceability

You need a supplier with IATF 16949 when you're producing automotive parts for an OEM or Tier-1 supply chain. It's essential there — and usually overkill for a general plumbing fitting.

Which one does your program need?

ISO 9001 for almost everything. IATF 16949 when the automotive supply chain requires it.
  • General industrial / electrical / plumbing components? ISO 9001 is the right baseline.
  • Automotive or EV production parts? Require IATF 16949.
  • Either way, ask for the supporting documentation — material certificates, inspection reports, and declarations — not just the certificate itself.

How Kedar Hub helps

The manufacturers we represent hold ISO 9001, IATF 16949, RoHS and REACH credentials, and we match your program to the right one — so you're never over-paying for a certification you don't need, or under-covered for one you do. We supply the full documentation package (MTC, FAI, PPAP and more) your incoming inspection expects.

Not sure which certification your part needs?

Tell us the application and we'll confirm the right standard — and the manufacturer to match.

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