Metric Screw Thread Callout

[truckpoor]

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.

 

[gearguru]

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.

 

[ctopher]

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

 

[Tunalover]

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

 

[truckpoor]

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.