4 40 Form Tap Drill Size - If not specified, assume a thread depth of 75%. Grey cast iron, malleable and spheroidal iron. Tap size drill size decimal equivalent percentage of thread. You can learn more about thread depth in tapping here. Special, super and titanium alloys. Tap drill sizes for forming taps.
If not specified, assume a thread depth of 75%. Grey cast iron, malleable and spheroidal iron. Special, super and titanium alloys. Tap size drill size decimal equivalent percentage of thread. Tap drill sizes for forming taps. You can learn more about thread depth in tapping here.