NC, NF & NPT thread types. 1-1/2 in and 2 in OD adjustable dies (WSW1PZ53), 1-1/2 in and 2 in OD solid dies (WSW1PZ37).6 Machine Screw hand taps from 4-40 to 12-24. 10 UNC Tap and Dies: 1/4 in -20 to 1 in-8. 10 UNF Tap and Dies: 1/4 in-28 to 1 in -14.2 N