The most common way to produce an internal thread is to drill a hole and then use a tap to produce the thread. This is usually referred to as a tapping drill for the size of thread that needs to be produced.
This drill tap chart provides the information you need to properly drill and tap holes. This chart includes values for screw sizes and the proper size drill bit to use to make the hole for the tap.
There are four unique tables on this Drill Tap Chart:
*Sign up below to receive your free wall chart!*