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What do Plating specs MFZn1c, MFZn8-S, etc. mean?

Quickstart: Terms like "MFZn2" are *NOT* plating specifications. They're just CODES like "Class 1" or "Type 3" and are meaningless without the specification number they are found within. For example, Zn5 means 5µ plating thickness in some specs, but Zn2 does *NOT* mean 2µ thickness (it's from a different specification and probably means 8µ).

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Q. What's the MFZn1-SC plating?

C Ponniah
- Chennai, India
February 16, 2024

Ed. note: Sorry, that's a code within some specification or other; it's meaningless until the specification it's contained in is named.

Q. I Want to Know about MFZn 8TC Plating

May 9, 2024

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Q. Does anybody know what the plating spec. MFZn-Ni 8-a3-3 is?

John J Colucci
- Waterbury, Connecticut

A. Hi John. That's not a spec, just a code within some spec.
The code "MF" means a ferrous substrate in some specs; "Zn-Ni" means zinc-nickel plating in some specs, "8" means 8 microns plating thickness in some specs. "a3-3" is probably a code describing the chromating requirement but I'm not sure. You must find out the spec number, obtain the specification, and plate in accord with the spec in its entirety.
Good luck!

Ted Mooney,
Ted Mooney, P.E.
Striving to live Aloha - Pine Beach, New Jersey

Q. Regarding Honda's plating spec no. MFZn2-C. What color would the chromate be on this spec? It seems unclear whether it would be clear or yellow chromate.


Robert Bittner
metal stamping manufacturer - Geneva, Ohio

A. Per your question regarding MFZn2-C, "C" means Yellow passivation.
B means Blue passivation, and K means Black passivation

- Bangkok, Thailand
June 22, 2009

? I think C may refer to CLEAR and K may refer to Black? Be happy to hear from someone who KNOWS!

Debbie A [last name deleted for privacy by Editor]
- Grand Rapids, Michigan USA
July 27, 2010

A. C means the Zn plating color is yellow, and B means Bright color.

- Taichung, Taiwan
February 14, 2012

Q. Hello,

What Honda spec is code MFZn2-C defined in?


John Tak
- Cleveland, Ohio, USA
April 28, 2014

A. Answering my own question...

MFZn2-C is defined in Honda spec HES D2003-05.

How to interpret MFZn2-C (what the M means, what the F means, etc) is defined in Honda HES A3010-05.

Unfortunately, as best I can tell, the "-C" just means "colored chromate" and doesn't indicate clear or yellow.

John Tak [returning]
- Cleveland, Ohio, USA

thumbs up sign Hi John. Thanks so much for giving us those Honda specification numbers! This should greatly help out the many posters who made reference to codes thinking they were specification numbers.

Luck & Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
Striving to live Aloha - Pine Beach, New Jersey

Q. I'm working in a plating shop in Bekasi, Indonesia. I have a question from my customer about the meaning of the number "2" in symbols MFZn-1S-2. Would you please find the answer or tell me where I can find the answer. Thank You.

Cintadi P. Liauw
Plating shop - Bekasi, Jawa Barat, Indonesia

A. Hello Cintadi.
It has the sound of a code in Japanese specs for zinc plating plus chromating on steel. But these are codes defined within the specification and will mean very different things depending on what specification they are found in, just as "Type 2 Anodizing" means one thing in MIL-A-8625 but "Type 2 Anodizing" means something utterly different in AMS-2488

I'd inquire if they are referring to JIS H-8610 and JIS H-8625 or to a specific automaker's spec, or some other spec. Good luck!

Ted Mooney,
Ted Mooney, P.E.
Striving to live Aloha - Pine Beach, New Jersey

Q. I am looking for the details on spec ESP-WS-7620 REV. K with surface treatment MFZn-2S


Angie Robinson
Fastener Distributor - Lake Zurich, Illinois, USA

A. Hi Angie. I believe that that one might be a Mitsubishi Motors spec for zinc plating on a steel substrate. Good luck!


Ted Mooney,
Ted Mooney, P.E.
Striving to live Aloha - Pine Beach, New Jersey

Q. Hi I am Karthik. I am entirely new to plating, so could you help me in describing the following plating specification?

MFZn1c -- what does this means?

Karthik Kanniyappan
- Chennai, India
May 2, 2012

A. MFZn1-C means:

MFZn: Zinc plating on base is Steel
1: Means 5 micron Min. plating thickness
C: Yellow color

Le Giao
Engineer - Taiwan
April 18, 2022

Ed. note: Possibly, assuming it's on a Honda drawing :-)

Q. What does this mean?


Muhammad Khan
- Pakistan, Karachi
February 14, 2013

A. Hi Muhammad.

It has the ring of a Honda spec, so if you have no reason to believe otherwise, please contact Honda for the spec. You can't offer plating to a spec. without having the spec. in hand, so finding out what the acronyms stand for isn't the answer anyway. Good luck!


Ted Mooney,
Ted Mooney, P.E.
Striving to live Aloha - Pine Beach, New Jersey

Q. Hi, Ted Mooney

Yes, it is Honda Spec.

This is Zinc alloy plating (Ni is 6 ~ 10%)
Thickness is 8 Microns min and Bright in colour

Please explain in detail.


Muhammad Khan
- Karachi, Pakistan

A. Hi cousin. Sorry, but we seem to be having language difficulties. You already said it's a Honda spec. for Zn-Ni plating with 6-10% nickel, a minimum of 8 microns in thickness, and bright in color. Courtesy of John Tak's posting, the Honda spec numbers may be HES D2003-05 and HES A3010-05. If you're asking for the spec to be put on line or emailed to you, sorry, no one is allowed to do that except your Honda buyer; the spec clearly states on every page:

"This engineering standard is a business secret ... any act to copy, use, or transfer this standard without prior approval constitutes illegal misconduct ... Honda Proprietary Information DO NOT SAVE".

Sorry but you must contact your Honda buyer for these specs. Good luck!


Ted Mooney,
Ted Mooney, P.E.
Striving to live Aloha - Pine Beach, New Jersey

Q. Hi,
I would like to know about "MFZn-5TC" surface coating. If anyone has the answer please let me know.


Shravan Tripathi
- Indore, India
May 16, 2013

Q. Dear sir,


Marudhupandian Ganesan
- Chennai, India
August 30, 2013

Q. Good afternoon,

I am from South Africa and have never encountered this specification before: MF Zn Ni T2-C
Could you assist please?

Jade Cupido
Technical Service Analyst - South Africa
November 21, 2013

Q. Can I ask what is the meaning of this plating code MFZn 8 Cr3 (the no. "8" and "Cr3")? Thanks in advance.

Enelia Puma
- Sta. Rosa Laguna, Philippines
May 22, 2014

A. Hi Puma ,

'MFZn8Cr3' means:

Zn - Zinc plating
8 - Thickness 8 microns
Cr3 - Trivalent Chromate Passivation


Surya Narayana
Process Engineer - Tumkur , Karnataka , India.

Ed. note: Possibly :-)

Q. I have this spec Plating MFZn8-a3-Cr, and need you to tell me about this. Thanks.

Jose Torres
- Ramos Arizpe Coahuila Mexico
August 14, 2014

Ed. note: That is not a spec, Ramos, it is a code within a spec. You need to tell us what spec, not vice versa :-)

Please explain JIS H-8610 MF Zn1-cb.

Thank you,

METAL FINISHERS - Chennai-Tamil Nadu, India
June 9, 2015

Q. Sir what is MFZn8-3.CF?

Donald Magos
Metal Fabrication - City of Bacoor, Cavite, Philippines
June 26, 2015

Q. I have a print for a part made from P20 (Fin Guide). Dual language print is in English and Chinese and calls out for a surface treatment of MFNiIII or MF Ni III. Does anyone have a guess as to what this may be?

Jeff Hanaway
plating shop owner - Meadville, Pennsylvania
August 5, 2015

Japanese coating specification MZNFE8-TB meaning?

Q. Please let me know the specification that describes and the meaning of the Japanese coating specification MZNFE8-TB. Please let me know where to find this Japanese material coating specification for MZNFE8-TB.

Dennis Lee
Engineer - Wylie, Texas, USA
August 31, 2015


Thickness = ?

Mr. Prudchaya
part automotive - Ayuthaya, Thailand
June 21, 2016

thumbs up signMy guess is either that there's a typo there and what you wrote doesn't specify a thickness; or that it's a Honda spec. where the 2 means class 2 and 8 microns. But please don't guess :-)


pic of Ted Mooney
Ted Mooney, P.E. RET
Striving to live Aloha - Pine Beach, New Jersey

Q. I received drawings from Japan with treatment MFZnh-C

Reading the forum I discovered that C means Yellow, and Zn means Zinc coating but what does "h" mean?

Or [maybe it's] MFZnII-C - what does "II" mean?

Thank you in advance

Cinthya Y [last name deleted for privacy by Editor]
Product designer - Sao Paulo, Brazil
June 27, 2016

thumbs up sign We've moved on from guessing what finish might be implied by a code within an unspecified specification to conjecturing what requirement might have been underneath a smudge :-)

C'mon folks, misunderstanding is the #1 cause of financial loss in business; you can't proceed without clarification from your customer.


pic of Ted Mooney
Ted Mooney, P.E. RET
Striving to live Aloha - Pine Beach, New Jersey

Difference between MFZn2C and PFZn8C

Q. What is the difference between MFZn2C and PFZn8C? Is there a difference is the plating specifications?

John Bryant
- Opelika, Alabama US
June 16, 2017

A. I work within the Honda organisation and have access to the specs.
I can confirm that MFZn2-C translates as:-
Electroplate, ferrous, Zinc, plating grade 2, Coloured chromate.

David Seymour
Honda - Swindon, England

Q. What is standard for plating of MFZn8-K ?
I need what are the materials deposited in this plating & their percentage.

Pradip Gaikwad
- Pune, Maharashtra, India
January 18, 2018

Q. Dear sir,
We are Honda supplier and we got a surface treatment for one metal part MFZn.Ni1-B+TB3801
Sir can I get this specification?

Shripad Narayan Limaye
- PUNE, Maharashtra, India
March 6, 2018

A. Shripad,
If it's a Honda specification, the best place to get it would be from Honda themselves.

ray kremer
Ray Kremer
Stellar Solutions, Inc.
supporting advertiser
McHenry, Illinois
stellar solutions banner

Q. Hi Sir,

What does it mean "finish-zinc plate to MFZn8S", especially MFZn8S? It is required from General Motors.

Sophie Wei
- Shanghai, China
July 6, 2018

Q. I want to know the specifications or detail meaning of plating code MFzn8S

kuwad Mahavir Amarchand
- Pune Maharashtra India
June 10, 2022

Q. Hi, I am sukhwinder, I found the plating specification of MFZn 8 (Colour Cluster). Please help me.

- Rohtak, Haryana, India
October 20, 2018


August 5, 2019

Q. Please enlighten us with PFZn5c...

colour , plating thickness

Ashutosh kumar
September 15, 2020
- Delhi, India

Q. What is the Meaning of MFZn8C-NH, I have received one drawing from Japan & plating grade is mentioned MFZn8C-NH
Can anyone explain what is actual meaning of "NH"

Kanhaiya Kumar
May 14, 2021

A. Kanhaiya,
Maybe you've gotten the idea from the replies to the older similar questions below, but the best thing to do in a situation like this is go back to the CUSTOMER, ask what spec or standard the plating grade comes from, if they can give you a copy of that spec or standard, and if not where you can get it from.

A proper drawing should have the relevant spec or standard listed right on there.

ray kremer
Ray Kremer
Stellar Solutions, Inc.
supporting advertiser
McHenry, Illinois
stellar solutions banner

Q. According to Honda's coating specifications, what is the code MFCu and how about its colour?

Santhosh gautham
- Chennai, tamilnadu, India
July 9, 2021

Q. Hello, Good day!

I'm still confused with plating Zn
My Company only have drawing with material & plating MFZnIII and my customer drawing is MFZn2-B, MFZn5-B and MFZn8-CF, is the plating same or not?

Can do you explain to me about that?

Thank You So Much.

Best Regards,

Muhammad Angga
- Cikande, Indonesia
August 31, 2021

A. Hi Muhammad. No, they are not the same.
Thank you for writing in American english, but I think we're having language difficulties, because people have repeatedly tried to make the same two points.

1. Codes like "AAA", "ED", "SAD", and "MFZnIII" mean nothing at all out of context. "III" could mean "trivalent chromate", it could mean "level III inspection", it could mean "for type III (severe) exposure
2. Offering a price quote on something, let alone trying to supply it, without the specification in hand is a problem.

Luck & Regards,

pic of Ted Mooney
Ted Mooney, P.E. RET
Striving to live Aloha - Pine Beach, New Jersey

Q. what meaning of MFZn8-CF

prashant kamble
- aurangabad
March 24, 2023

Q. I want to know the specifications or detail meaning of plating code MFzn8-CF

March 25, 2023

Tip: People don't like to give and not receive. Readers often reply to actual situations (from which they can learn), but less commonly to abstract questions.


May 22, 2023

Q. What does it mean, coating EP- FE/ZN8/HB/CM2Y

s udhayakumar
Employee - chennai
August 19, 2023

Q. What is the meaning of MFZn2-E ?

Deviana Alamsyah
Quality Assurance - Bekasi, jabar , Indonesia
October 18, 2023

Ed. note: Please see thread 35197 for another long list of guesses about similar sounding plating codes.

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