Certificates of Conformance, MTRs and Test Reports
Different documents prove different things. A certificate of conformance is a statement; a mill test report and a lot test report contain actual results.
Document types
| Document | What it shows |
|---|---|
| Certificate of conformance (CoC) | Supplier statement that parts meet the spec |
| Mill test report (MTR) | Chemistry and properties of the raw material heat |
| Lot test report | Tests on the finished fastener lot (hardness, proof, etc.) |
| EN 10204 2.1 / 2.2 | Declaration of compliance / with non-specific test results |
| EN 10204 3.1 | Specific test results, certified by manufacturer's inspection |
| EN 10204 3.2 | 3.1 plus independent or customer inspector |
Governing standards: EN 10204; ASTM F1470-24. Editions shown are the latest confirmed as of September 2026. The drawing and the governing standard always take precedence over this sheet.
These tables carry the same figures as the printed sheet below.
The printed sheet
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Text version of this sheet
Certificates of conformance, MTRs and test reports
What it is
AT A GLANCE
CERT
Different documents prove different things. A certificate of conformance is a statement; a mill test
report and a lot test report contain actual results.
Know what the cert actually certifies
Document types
Document
What it shows
Certificate of conformance (CoC)
Supplier statement that parts meet the spec
Mill test report (MTR)
Chemistry and properties of the raw material heat
Lot test report
Tests on the finished fastener lot (hardness, proof, etc.)
EN 10204 2.1 / 2.2
Declaration of compliance / with non-specific test results
EN 10204 3.1
Specific test results, certified by manufacturer's inspection
EN 10204 3.2
3.1 plus independent or customer inspector
Governing standards: EN 10204; ASTM F1470-24. Editions shown are the latest confirmed as of September 2026. The drawing and the governing standard always take precedence
over this sheet.
torquing any fastener. Verify the current governing standard, project documents, OEM requirements, size, thread, coating and lot certification. To the fullest extent permitted by law, The Fastener App disclaims liability
arising from reliance on this reference.
Fastener Guide reference FG-5087D9 · thefastenerapp.com/fastener-guide/quality-traceability/certificates-of-conformance-mtrs-and-test-reports · © The Fastener App. Reference only — verify the current governing standard, drawing and manufacturer data before specifying or installing.
