Problem with thread replication

[LCform]

Hi All

I always have problem in using cosmetic thread in solidworks. Mostly when I have a part in hand , already threaded with an arbitrary pass, that I can not replicate it in solidworks. Using the standard threads like Ansi Metric ,etc.. For example , when I have a part of 15 mm diameter, that has an external thread of 1 mm pas with 14.25 length , solidworks shows me M14 at maximum , for Ansi Metric , none of them with pass 1 mm ! So I wander in all available standards and tables of threading , but I don't know well, once for all ! What are the steps, to design a model for a part with any different threading , that I don't know on which basis is done , I mean , when I measure the maximum diameter of the thread, and it is 15 mm, doesn't it mean it's M15 ?? What should I indicate ? I appreciate the most elaborated answers. This has been a pain for me for a while

Thank you

 

[Updraft]

There is no M15 as a standard thread size.

http://www.fullermetric.com/technical/information/tech_basic_metric thread_chart.aspx

 

[MadMango]

But there's still data on that size.

http://mdmetric.com/tech/M-thead 600.htm

Since you are only using cosmetic threads, match your Major or Minor Diameter to the thread size you need.

"Art without engineering is dreaming; Engineering without art is calculating."

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