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Metric Screw Thread Callout

Metric Screw Thread Callout

Metric Screw Thread Callout

(OP)
Hi All, new memeber.

Have a question on how to dimension a screw thread.  It's metric, 16mm with a pitch of 1.0mm.  Need to tap a hole with this type of thread.  Am using the ANSI Y14.5M-1994.  

All I can find in my references are a minumum nominal size, threads per inch, thread form and thread class.  I'm used to calling out fractional threads as .250-20 UNC-2B.  What is the format for calling out metric threads with these parameters?

Thanks in advance.

RE: Metric Screw Thread Callout

M16x1 7H could be an example for the tapped hole; 7H being the tolerance, it can be different, it depends on the tolerance of the bolt and fit you need.
Look in the Machinery Handbook for more info.

RE: Metric Screw Thread Callout

gearguru is correct.
Do a google search to find more info.
Also...FYI, it's ASME Y14.5M-1994, not ANSI. And it doesn't have thread info.

Chris
Sr. Mechanical Designer, CAD
SolidWorks 05 SP3.1 / PDMWorks 05
ctopher's home site (updated 06-21-05)
FAQ559-1100
FAQ559-716

RE: Metric Screw Thread Callout

truckpoor-
Go to Machinery's Handbook for this information.  If you don't have one you should consider getting one.

TYou could try the Maryland Metrics webpage.  They have good data there.  I trust you can find their website.

Tunalover

RE: Metric Screw Thread Callout

(OP)
Okay, thanks. Don't know why I had such a problem.  I've called out metric threads before, just couldn't find any of my old drawings.  Brain fart...

I have a bright and shiny brand new machinists handbook sitting on the floor of my office.  I always forget about that thing because I try to use Y14.5 exclusively.  Machinist's handbook is a reference only thing for me.  

Thanks again.  Looks like a pretty informative forum.  I'll be checking back often.  

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