-- The Home Page of the Finishing Industry

on this site
current topics
Live! From beautiful Pine Beach New Jersey: Welcome to the world's most popular metal finishing website

topic 29188

Plating of Internal Threads

A discussion started in 2004 but continuing through 2018


Q. Hello,

I am an undergraduate student doing a project on QC in a medium scale industry and I am given a problem existing in the company to be resolved. The problem is actually from the customer end as there are more rejections in the core plate. I found the root cause for the rejection is that the internal thread answers the gauge before plating but after plating it is not answering.

So we found the cause to be that the problem is due to irregular plating in threads done by the barreling method. So could any one suggest me a good way to plate internal threads which has uniform plating?

student - Chennai, Tamilnadu, India


A. Plug the holes before plating. Even easier, make the holes after plating. If you must have plating on the threads, use a slightly oversize tap to allow for the build-up of plating.

Tom Gallant
- Long Beach, California, USA


A. If you are plating with a relatively soft metal you can use a roll tap to open up the hole without removing all of the plating.

Matt Evans
- Philadelphia, Pennsylvania


A. Dear Gurbaran,

Please check what kind of tolerance gauge you are using. Before plating the gauge for checking to be used 6G, and after plating the gauge to be used 6H.

Rakesh Sharma
- Delhi, India

April 11, 2018

Q. I want to know what M12x1.0-6g means in threads.

Brijesh tripathi
- Noida ,Up, India

April 2018

A. Hi Brijesh. There is a short and very easy to understand pdf on the subject at

29188-1b   29188-1a

Luck & Regards,

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

If you have a question in mind which seems off topic, please Search the Site

ADD a Q, A, or Comment on THIS topic START an UNRELATED topicView CURRENT HOT TOPICS

Disclaimer: It's not possible to diagnose a finishing problem or the hazards of an operation via these pages. All information presented is for general reference and does not represent a professional opinion nor the policy of an author's employer. The internet is largely anonymous & unvetted; some names may be fictitious and some recommendations may be deliberately harmful.

  If you need a product/service, please check these Directories:

JobshopsCapital Equip. & Install'nChemicals & Consumables Consult'g, Train'g, SoftwareEnvironmental ComplianceTesting Svcs. & Devices

©1995-2019, Inc., Pine Beach, NJ   -   About   -  Privacy Policy
How Google uses data when you visit this site.