ISO Metric Threads Calculator

Calculate Metric Thread tolerances based on thread designation.

ISO Metric Thread Calculator

Select from the following and Click Check.

Thread Type
Designation
Check

Metric Threads Results

Metric Threads Results will be shown here.

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ISO Metric Threads (Explained)

Our tool is a metric thread tolerance calculator that is addressed to students, employees, and apprentices (trainees) in all technical sectors. It calculates minor diameter, pitch diameter, major diameter and tap drill size by simply selecting from a list the desired designation and type of thread. The ISO Metric Standard is the most commonly used used. The `M` designation for metric screws indicates the nominal outer diameter of the screw/nut thread, in millimeters.

Supported metric threads range from M0.25 up to M120.

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