Metric thread

The metric thread (or metric thread ISO , isometric threading , V thread ) is a Filetage which starts from a equilateral Triangle.

In the designation, the symbol of the metric thread is M .

It there several type of step: a large step and a step fin.
The indication of the step in designation, for the large step, is optional: if the step is not indicated, it is about a large step. Designation for a fine step is the letter S.

This type of threading is used the most, it is easiest to manufacture. It is a very good compromise.

Profile of the metric thread

Not large (normal)

The use of the values in fatty is recommended. It is necessary to avoid the use of the value in nonfat. And the values between brackets should not be used.

Not fine

The use of the values between brackets is not recommended.

See too

trapezoidal Metric thread
round Threading
Threading gas
Threading in teeth of saw

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