Drill America DWTH212-34NPT 3/4" NPT 2-1/2" OD HSS Round Adjustable Pipe Die, DWTH212-34NPTDrill America DWTH212 34NPT 3 4" NPT 2 1 2" OD HSS Round Adjustable Pipe Die, DWTH212 34NPT For threading, a High Speed Steel Round Adjustable Die is desired for improved wear life. Round Dies are chamfered on both faces. One side has a 2 to 3 thread chamfer for threading, the other side has a 1 to 1 1 2 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