1/4-20 Form Tap Drill Size - — (.0068 x % of thread desired) threads. To establish tap drill sizes for inch size roll forming taps tap drill size = basic tap o.d. Grey cast iron, malleable and spheroidal iron. Find the tap drill size for forming npt and nps threads with jarflo pipe taps. Find the optimal drill size for different types of taps and materials using this online tool. Enter the major diameter, threads per inch or pitch, and. Special, super and titanium alloys. See the chart for taper hole and straight hole sizes for different.
Find the optimal drill size for different types of taps and materials using this online tool. Enter the major diameter, threads per inch or pitch, and. Special, super and titanium alloys. To establish tap drill sizes for inch size roll forming taps tap drill size = basic tap o.d. Find the tap drill size for forming npt and nps threads with jarflo pipe taps. Grey cast iron, malleable and spheroidal iron. See the chart for taper hole and straight hole sizes for different. — (.0068 x % of thread desired) threads.