#4 – 1/2 in. Round Dies Carbon Steel NC and NF Tap and Die Set (40-Piece)

#4 – 1/2 in. Carbon Steel NC and NF Tap and Die Set with Round Dies. Sizes #4 – 40 in., #10 – 24 in., #10 – 32 in., #12 – 24 in., #4 – 40 in., #6 – 32 in., #8 – 32 in., 1/2 in. – 13 in., 1/4 in. – 20 in., 1/2 in. – 20 in., 1/4 in. – 28 in., 1/8 in. – 27 in., 3/8 in. – 16 in., 5/16 in. – 18 in., 5/16 in. – 24 in., 3/8 in. – 24 in., 7/16 in. – 14 in., 7/16 in. – 20 in. and 1/2 in. – 20 in. Set also includes 2 straight tap wrenches, 1 – 1/2″ and 2″ die handles. About Carbon Taps: Carbon Steel Hand Taps are used to re – thread damaged and/or jammed threads. Carbon Steel Hand Taps may also be used to thread mild steels. Taper Style: Starts the thread square with the workpiece. Plug Style: Generally used in thru holes. Bottom Style: Generate the thread to the bottom of the hole. About Carbon Round Adjustable Dies: For re – threading, a Carbon Steel Round Adjustable Die is desired for improved wear life. Round Dies are chamfered on both faces. 1 side has a 2 in. to 3 in. thread chamfer for threading, the other side has a 1 in. to 1-1/2 in. thread chamfer for threading close to a shoulder. Adjustment is obtained by a fine pitch screw which forces the sides of the die apart or allows them to spring together. 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.