Fastener Guide / Specification & Engineering Control

Engineering Change and Deviation Control

A change permanently revises the design; a deviation allows a specific non-conforming lot or period. Both need records that link back to the parts.

Last reviewed 2026-09-10 · Governing standard: ISO 9001; AS9100 (aerospace) · reference FG-CFA631 · Report an error on this sheet

Change vs deviation

Engineering change (ECN / ECO)Deviation
ScopePermanentTemporary: lot, quantity or date
Approved byDesign authorityDesign authority and quality
RecordDrawing revisionDeviation number on the lot
StockDisposition of old stock definedOnly named lots covered

Governing standards: ISO 9001; AS9100 (aerospace). 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

Engineering Change and Deviation Control

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Text version of this sheet

Engineering change and deviation control

What it is

AT A GLANCE

A change permanently revises the design; a deviation allows a specific non-conforming lot or period.

Both need records that link back to the parts.

ECN

Control every change

Change vs deviation

Engineering change (ECN / ECO)

Deviation

Scope

Permanent

Temporary: lot, quantity or date

Approved by

Design authority

Design authority and quality

Record

Drawing revision

Deviation number on the lot

Stock

Disposition of old stock defined

Only named lots covered

Governing standards: ISO 9001; AS9100 (aerospace). 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-CFA631 · thefastenerapp.com/fastener-guide/specification-control/engineering-change-and-deviation-control · © The Fastener App. Reference only — verify the current governing standard, drawing and manufacturer data before specifying or installing.

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Share of dollars

Fasteners37%$69,879
Electrical10%$19,152
Fleet and Automotive7%$12,293
Hardware and Building Supplies5%$10,243
Tools and Equipment5%$9,811
Cutting Tools and Metalworking5%$9,740
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Share of times ordered

Fasteners44%355
Electrical12%94
Fleet and Automotive7%53
Tools and Equipment6%48
Cutting Tools and Metalworking4%36
Pneumatics4%34
Hardware and Building Supplies4%33
All other20%162

Share of pieces

Fasteners75%486,316
Fleet and Automotive6%38,905
Electrical5%31,100
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Abrasives3%17,251
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Share of the rep’s business

Summit Precast LLC20.2%
Brunswick Galvanizing Inc.14.6%
Talleyrand Signs LLC8.0%
Mayport Tool & Die Inc.7.8%
Eagle Mechanical LLC7.2%
Premier Electric Group5.9%
Tallahassee Packaging LLC3.7%
Coastal Maintenance Group3.3%
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CustomerHours a monthHours a week
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Brunswick Galvanizing Inc.25.35.8
Talleyrand Signs LLC13.93.2
Mayport Tool & Die Inc.13.53.1
Eagle Mechanical LLC12.52.9
Premier Electric Group10.22.4
Tallahassee Packaging LLC6.41.5
Coastal Maintenance Group5.71.3
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