RIDGID Ridge tube tube wire tapping wire tapping hand :( limit NPT standard) · made of carbon steel, only the right-hand thread · particularly suitable for small areas restricted ? All threaded taper per foot? "Order Number Type Description drill size (inch) nominal pipe size number of teeth per inch weight standard packaging inch mm g 35815 35820 35825 35830 35835 35840 35845 35850 35855 E-5112 E-5113 E-5114 E-5115 E-5116 E-5117 E-5118 E-5119 E-5120 NPT thread NPT thread NPT thread NPT thread NPT thread NPT thread NPT thread NPT thread NPT thread 7/16 9/16 21/64 45/64 29/32 19/64 131/64 147/64 215 / 64 1/8 1/4 3/8 1/2 3/4 1 11/4 11/2 2,361,012,202,532,405,027 18 18 14 14 111/2 111/2 111/2 111/2 0.03 0.06 0.1 0.1 0.2 0.5 0.6 0.9 1.5 111111111