International Hardcoat
Specifications
We meet over 150 industry, OEM, and military specifications—delivering trusted, certified aluminum finishing solutions for the most demanding applications.
Most-requested specifications
We finish to more than 150 military, aerospace and OEM specifications. These are the ones customers ask for most. If your drawing calls out a spec that isn’t on this page, send it with your quote request.
| Specification | What it covers | Type / class | Process |
|---|---|---|---|
| MIL-A-8625 Type II | Sulfuric acid anodize | Class 1 (clear) or Class 2 (dyed) | Sulfuric anodize |
| MIL-A-8625 Type IIB | Thin-film sulfuric anodize, the usual substitute for Type I chromic | Class 1 or Class 2 | Sulfuric anodize |
| MIL-A-8625 Type III | Hard anodic coating (hardcoat) | Class 1 (clear) or Class 2 (dyed) | Hardcoat |
| MIL-A-63576 | Hardcoat impregnated with PTFE (Teflon) for low friction | Type I | PTFE hardcoat (AnoLube) |
| AMS 2468, AMS 2469 | Hard anodic coating (aerospace) | — | Hardcoat |
| ASTM B580 | Anodic oxide coatings on aluminum; Type A is hardcoat | Type A | Hardcoat |
| AMS 2482 | PTFE-impregnated hard anodic coating | Type I | PTFE hardcoat (AnoLube) |
| AMS 2471 | Sulfuric acid anodize (aerospace) | — | Sulfuric anodize |
| MIL-DTL-5541 | Chemical conversion coating (chem film) | Type I (hexavalent) or Type II (trivalent); Class 1A or Class 3 | Chromate conversion |
| AMS 2473, AMS 2474, AMS 2477 | Chemical conversion coating (aerospace) | — | Chromate conversion |
| MIL-STD-171 | Finishes for metal parts, called out by finish number | 7.2.1 / 7.2.2 anodize, 7.3.1 / 7.3.3 conversion, 7.5.1 / 7.5.2 hardcoat | Primary coatings |
| MIL-DTL-14072 | Finishes for ground electronic equipment | E514 hardcoat, P513 chemical conversion | Primary coatings |
| MIL-PRF-46010 | Heat-cured solid film (dry film) lubricant | — | Dry film lube |
All specifications
AMS 2468 Hardcoat
AMS 2469 Hardcoat
AMS 2471 Sulfuric Anodize
AMS 2473 Chemical Conversion
AMS 2474 Chemical Conversion
AMS 2477 Chemical Conversion
AMS 2482 Type I Teflon Impregnated Hardcoat
ASTM B580 Type A Hardcoat
BDS 11.10 Hardcoat
CPW 755 Thin Film Anodize
MIL-A-8625 Type II Sulfuric Anodizing
MIL-A-8625 Type IIB Thin Film Sulfuric Anodizing
MIL-A-8625 Type III Hardcoat
MIL-C-5541 Chemical Conversion Coating
PTFE Spec Numerous Aerospace Specifications
MIL-A-63576 Type I Teflon Impregnated Hardcoat
MIL-A-8625 Type II, Class 1 or 2 Sulfuric Anodize, Dyed or Non-dyed
MIL-A-8625 Type IIB Thin Film Anodize
MIL-A-8625 Type III, Class 1 or Class 2 Hardcoat, Dyed or Non-dyed
SQM-4P9001-AA Hardcoat
MIL-DTL-14072 Finish E514 Hardcoat
MIL-DTL-14072 Finish P513 Chemical Conversion
MIL-DTL-5541 Type I Chemical Film, Hexavalent
MIL-DTL-5541 Type II Chemical Film, Trivalent
MIL-DTL-5541 Type I or Type II Chemical Conversion, Hexavalent or Trivalent
MIL-PRF-46010 Dry Film Lube
MIL-STD-171 Finish 7.2.1 or 7.2.2 Sulfuric Anodize, Dyed or Non-dyed
MIL-STD-171 Finish 7.3.1 or 7.3.3 Chemical Conversion, Hexavalent or Trivalent
MIL-STD-171 Finish 7.5.1 or 7.5.2 Hardcoat, Dyed or Non-dyed
P3102 Sulfuric Anodize, Dyed or Non-dyed
P3103 Hardcoat
P3212 Chemical Conversion
PN 14.07 Teflon Impregnated Hardcoat
PN 14.12 Chemical Conversion
PS 4569 Hardcoat
PS 6426 Sulfuric Anodize
PS-6426 Sulfuric Anodize
SB5992 Sulfuric Anodize
Specification FAQs
What’s the difference between Type II and Type III anodizing?
Type II (sulfuric) anodize is a thinner coating used for corrosion protection and colour. Type III (hardcoat) is thicker and much harder, for parts that see wear and abrasion. Both are covered by MIL-A-8625.
What does Class 1 or Class 2 mean?
Under MIL-A-8625, Class 1 is non-dyed (natural or clear) and Class 2 is dyed.
Do you offer Type I chromic acid anodizing?
No. We run MIL-A-8625 Type IIB thin-film sulfuric anodize, which is commonly specified in place of Type I. Check with your customer or engineer that Type IIB is acceptable for your part.
MIL-DTL-5541 Type I or Type II: which do I need?
Type I uses hexavalent chromium. Type II is the non-hexavalent (trivalent) alternative that many primes now require. We run both, in Class 1A (maximum corrosion protection) and Class 3 (low electrical resistance).
What colours can you anodize?
Clear, black, red, blue and gold, and military colours such as olive drab, sand and flat dark earth (FDE). Ask about custom colours.
Do you run specifications that aren’t listed?
Very likely. We meet more than 150 industry, OEM and military specifications. Send your drawing with your quote request and we’ll confirm.
What certifications do you hold?
NADCAP accreditation for Chemical Processing and AQS, and ISO 9001:2015 certification. Certificates are linked at the bottom of every page.