Tap Drill Calculated (Unified)

 

Basic Major Diameter (for example: .25)
Decimal inches

Threads per Inch (for example: 20)

Percent of Full Thread:
Percent (Enter 75 for 75%)

Result:
Hole Diameter (See chart for nearest standard size)
Hole Size = Basic major diameter – (1.08253 X % Full thread / Threads per inch)

 

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