How Do You Read Tap And Die Sizes?
How Do You Read Tap And Die Sizes? Thus, a tap or die marked 1/4-20 NC cuts threads for a 1/4-inch-diameter screw or bolt with 20 coarse threads per inch. Taps and dies with diameters less than 1/4-inch are numbered according to the wire gauge sizes of machine screws. For example, a die marked 10-32