In this Question Line video, Jason answers the submitted question below regarding the use of the MMC modifier on threaded holes: 

I’ve heard that it’s not good practice to use the MMC modifier on threaded features, is this true?

Model and drawing of a threaded hole controlled by position with MMC modifier

 

In this video, Jason breaks down what the MMC modifier does and how bonus tolerance works, walking through an example of a clearance hole. He then considers applying it to a threaded hole, shown above, discussing how the ASME standards treat thread size, what that means for measurement, and why there is minimal benefit of applying MMC on a threaded hole. 

Looking for answers to your GD&T questions? Submit your question to our GD&T experts at the link below!      

https://www.gdandtbasics.com/share-your-gdt-questions/     

If your question is selected, we will notify you when our video answer is posted to our YouTube channel.     

* If you are a current student, reach out to us directly and we will get you into contact with your instructor. Active students’ questions receive a direct response within 24-48 hours.     

Stop hunting through pages. Get our GD&T Symbols Chart—your quick reference guide with every symbol on one page.

Save it to your desktop or print it out for quick reference. We’ll send the digital chart straight to your inbox. No spam, just helpful GD&T resources.

Get Your Free Chart