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—
®
EXTERNAL THREAD
Thread Size Minimum Pitch Diameter
Thread Pitch* Maximum Major Diameter
Cut Rod Size Minimum Major Diameter
Roll Shank Size Maximum Minor Diameter
Maximum Pitch Diameter
* Thread Pitch is only displayed for Numeric and U.S. Thread Sizes.
THREAD CLASSIFICATION
With the Machinist Calc Pro 2 you can choose between
Internal and External Threads. Entering a U.S. Thread Size
will allow you to choose among U.S. Thread Classes as
shown below.
THREAD TYPE U.S. THREAD CLASSES
Internal 1B 2B* 3B
External 1A 2A 3A
Entering a Metric Thread will allow you to choose among
Metric Thread Tolerance Classes as shown below.
THREAD TYPE METRIC THREAD TOLERANCE CLASSES
Internal 3G
3H
4G
4H
5G
5H
6G
6H*
7G
7H
8G
8H
9G
9H
External
3g
3h
3e
3f
4g
4h
4e
4f
5g
5h
5e
5f
6g
6h
6e
6f
7g
7h
7e
7f
8g
8h
8e
8f
9g
9h
9e
9f
* Default settings
3844-UG4088E-E.indd 403844-UG4088E-E.indd 40 11/18/2022 6:50:13 AM11/18/2022 6:50:13 AM
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