1. What is Metric Thread Sizing?

Metric thread sizing follows ISO (International Organization for Standardization) standards where pitch is diameter dependent. This calculator determines thread dimensions based on tabular data from ISO standards for metric threads.

2. How Does the Calculator Work?

The calculator uses ISO standard metric thread dimensions:

Where:

• Diameter — Major diameter of the thread in millimeters
• Pitch — Distance between thread crests (dependent on diameter)
• Minor Diameter — Inner diameter of the thread

Explanation: The calculator references standard ISO metric thread tables to provide accurate thread dimensions based on the input diameter.

3. Importance of Thread Standards

Details: ISO metric thread standards ensure compatibility and interchangeability of threaded components across international manufacturing and engineering applications.

4. Using the Calculator

Tips: Enter the major diameter in millimeters. The calculator will provide the standard pitch and minor diameter according to ISO metric thread standards.

5. Frequently Asked Questions (FAQ)

Q1: What is the difference between metric and imperial threads?
A: Metric threads use millimeter measurements and ISO standards, while imperial threads use inch-based measurements and different thread angle standards.

Q2: Are all metric thread pitches standardized?
A: Yes, ISO standards define specific pitch values for each diameter to ensure international compatibility.

Q3: When should I use fine vs coarse metric threads?
A: Coarse threads are general purpose, fine threads provide better adjustment precision and higher strength in thin-walled applications.

Q4: Are there limitations to standard metric threads?
A: Standard threads cover most applications, but special applications may require non-standard or custom thread profiles.

Q5: How accurate are the calculated thread dimensions?
A: The calculator uses official ISO standard data, providing industry-standard accuracy for engineering applications.