Definition · Calibration Laboratory Standard · AS9100 · ISO 9001 · IATF 16949
What Is ISO/IEC 17025 and Why Does It Matter for Thread Gauges?
Need gauges for this? GageTools manufactures metric GO/NO-GO thread gauges, including thread plug gauges and thread ring gauges in Dongguan, China. Standard sizes ship from stock within 72 hours, MOQ is 1 piece, and every RFQ gets a reply within 24 hours — request a quote.
ISO/IEC 17025 vs ISO 9001 — What Each Covers
| Standard | Who It Applies To | What It Requires |
|---|---|---|
| ISO 9001 | Your manufacturing facility | Clause 7.1.5: measuring equipment must be calibrated with traceable certificates at specified intervals |
| ISO/IEC 17025 | The calibration laboratory issuing your certificate | Accreditation of measurement methods, uncertainty budgets, traceability chain, and staff competence |
ISO 9001 tells you that you must calibrate your gauges. ISO/IEC 17025 tells you what makes a calibration laboratory trustworthy. You need both — your gauges calibrated by an ISO/IEC 17025 accredited lab, within the interval your ISO 9001 quality system defines.
What an ISO/IEC 17025 Certificate Must Show
- Actual measured values — pitch diameter, major diameter, minor diameter, pitch, and thread angle — not just PASS or conforms to specification
- Measurement uncertainty at k=2 (95% confidence level)
- Accreditation number of the issuing laboratory — verifiable through the accreditation body’s public registry
- NIST-traceable calibration chain — named reference standard and traceability statement
- Calibration date and temperature — 20°C is the ISO reference temperature for dimensional measurement
A certificate without actual measured values is not ISO/IEC 17025: Some suppliers provide a “calibration certificate” that shows only “PASS” or “Conforms to specification” without actual dimensional values. This is a conformance statement, not a calibration certificate, and does not satisfy ISO 9001 clause 7.1.5, IATF 16949, or AS9100 auditors. Always request actual measured values.
How to Verify ISO/IEC 17025 Accreditation
- Find the accreditation body named on the certificate (e.g. CNAS, UKAS, A2LA)
- Go to that body’s public online registry: cnas.org.cn · ukas.com · a2la.org
- Search the laboratory name or accreditation number
- Confirm the scope includes dimensional measurement of thread gauges
GageTools calibration certificates are issued by a CNAS-accredited laboratory. CNAS is an ILAC MRA signatory — certificates are accepted by ISO 9001, IATF 16949, and AS9100 auditors worldwide including Boeing, Airbus, and major automotive OEMs. Every gauge ships with actual measured values for all critical dimensions. See a sample certificate: request via WhatsApp.
✓ 20+ years gauge manufacturing
✓ ISO 9001:2015 certified
✓ In-house CNC grinding & inspection
✓ Drawing / RFQ reply within 24h
Need Thread Gauges with ISO/IEC 17025 Certificates?
Actual measured values · CNAS accredited · NIST-traceable · MOQ 1 · 72hr delivery
Pingback: Thread Gauge Calibration: How Often + What to Check