Formula: Tap Drill Size
1) Enter diameter (range 1/64 - 2)
2) Enter threads per inch
3) Select % of full thread

Do not use the " symbol . Use a hyphen for fractions over 1 inch.
Example: 1-3/16
You may use decimal sizes for the diameter.
Example: 1.1875

Diameter
Threads Per Inch
% of Full Thread
Theoretical Drill Size
Nearest Standard Drill Size
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