The following bolt thread series tables are available:
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TEMA Bolt Table
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UNC Bolt Table
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User specified root area of a single bolt
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TEMA Metric Bolt Table
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British, BS 3643 Metric Bolt Table
Irrespective of the table used, the values will be converted back to the user selected units.
TEMA threads are National Coarse series below 1 inch and 8 pitch thread series for 1 inch and above bolt nominal diameter. The UNC threads available are the standard threads.