Adjustment is obtained by a fine pitch screw which forces the sides of the die apart, or allows them to spring together.For threading, a High Speed Steel Round Adjustable Die is desired for improved wear life. m35x3 3" OD HSS Round Adjustable Die Special The slot is beveled so that when the dies are used in a machine holder the adjusting screw can be removed and adjustment made by the adjusting screws in the holder. Round Dies are chamfered on both faces.
Hand taps are also appropriate for tapping the vast majority of materials in through or blind holed conditions. 1-3/8in-32 UNS HSS Plug Tap and 1-11/32in HSS 1/2in Shank Drill Bit Kit High speed steel hand taps can be used for making new threads or re-threading damaged threads.