Continue to Site

Eng-Tips is the largest engineering community on the Internet

Intelligent Work Forums for Engineering Professionals

Congratulations SSS148 on being selected by the Eng-Tips community for having the most helpful posts in the forums last week. Way to Go!

RFS Modifier question

Thread starter scanner1234
Start date Mar 22, 2021

Status: Not open for further replies.

Mar 22, 2021

scanner1234

Mechanical

I have a drawing that calls out for ANSI 14.5M with no date. The drawing has both a true position callout with the modifier of circle S (RFS) and also has a true position without a circle S or no modifier. Does anyone think this might be a holdout from an old ANSI spec? Was there a time when MMC was assumed? Of course I'd like to assume MMC on the true position without the modifier. I do understand the current spec would be to assume RFS if not stated.

Thank you.