Fastener Guide / Technical Reference

Mechanical Galvanizing and Zinc-Flake Coatings

Mechanical galvanizing peens zinc powder onto parts with no electrolytic bath. Zinc-flake systems are thin dip-spin coatings. Neither is an electroplating process, which suits high-hardness parts.

Last reviewed 2026-09-10 · Governing standard: ASTM B695-21; ASTM F3393-24; ISO 10683:2018 · reference FG-AC100D · Report an error on this sheet

Comparison

SystemThicknessNotes
Mechanical zinc (ASTM B695)By class, e.g. Class 55 = 55 micrometresThick, matte; used on structural
Zinc flake (ASTM F3393)About 6 - 12 micrometres typicalThin, high salt-spray resistance; automotive, A490

ASTM F3393 (2020) replaced F1136, F2833 and F3019 for zinc-flake coatings and requires systems free of hexavalent chromium. Governing standards: ASTM B695-21; ASTM F3393-24; ISO 10683:2018. Editions shown are the latest confirmed as of September 2026. The drawing and the governing standard

These tables carry the same figures as the printed sheet below.

The printed sheet

Mechanical Galvanizing and Zinc-Flake Coatings

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Text version of this sheet

ASTM B695 · ASTM F3393 · mechanical zinc and zinc-flake

What it is

FIELD IDENTIFICATION

Mechanical galvanizing peens zinc powder onto parts with no electrolytic bath. Zinc-flake systems are

thin dip-spin coatings. Neither is an electroplating process, which suits high-hardness parts.

MECH GALV

ZINC FLAKE

Matte gray zinc coatings

Comparison

System

Thickness

Notes

Mechanical zinc (ASTM B695)

By class, e.g. Class 55 = 55 micrometres

Thick, matte; used on structural

Zinc flake (ASTM F3393)

About 6 - 12 micrometres typical

Thin, high salt-spray resistance; automotive, A490

ASTM F3393 (2020) replaced F1136, F2833 and F3019 for zinc-flake coatings and requires systems free of hexavalent chromium.

Governing standards: ASTM B695-21; ASTM F3393-24; ISO 10683:2018. 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-AC100D · thefastenerapp.com/fastener-guide/technical-reference/mechanical-galvanizing-and-zinc-flake-coatings · © The Fastener App. Reference only — verify the current governing standard, drawing and manufacturer data before specifying or installing.

Related sheets

← Hot-Dip Galvanized FastenersNickel-Alloy Fasteners →

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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%
All others (64 customers)29.4%

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CustomerHours a monthHours a week
Summit Precast LLC35.08.1
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
All others (64 customers)51.011.8

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