Carbonsteel pipe taps are designed to clean and or re-thread damaged or jammers pipe threads. The nominal size of a Pipe Tap is that of the pipe fitting to be tapped, not the actual size of the tap. The thread tapers 3/4 of an inch per foot. All Pipe Taps furnished with a 2-1/2 to 3-1/2 thread chamfer. NPT threads require the use of a sealer ThreadmillingNPT Threads. Over a year ago, we created a super helpful threadmilling calculator because we wanted to get reliable results on the first try. Thethread tapers 3/4 of an inch per foot. All Pipe Taps furnished with a 2-1/2 to 3-1/2 thread chamfer. NPT threads require the use of a sealer like Teflon tape or pipe compound. About the Dies: Drill America Hex Dies are for rethreading over bruised or rusty threads. They are the most cost effective type of rethreading tool available. NPT : Pipe and Fitting Thread Dimensions and Tolerances. All the relevant data for this tread in one spot. 1 1/2-11.5 NPT : Pipe and Fitting Thread Dimensions and M394 35.00 1-25/64 3 36.00 1-27/64 NPT & NPTF NPS & NPSF Pipe Tap Size Pitch (TPI) Drill Size* (inch) Pitch (TPI) Drill Size (inch) 1/16 27 0.242 (C) - - 1/8 27 0.332 (Q) 27 0.348 (S) Thread Mill Drill Ø = Thread Ø - (1.229 x Pitch x 0.75) For UN, Pitch = 1 / TPI NOTE: 0.75 represents 75% of full thread and can be reduced to 0.60 (60% TapDrill Sizes for 1/2 - 13 UNC. If not specified, assume a thread depth of 75%. You can learn more about thread depth in tapping here. To get the tap drill size in other depths, use our Tap Drill Size Calculator . Thread Depth. Tap 11.0000 1-1/64 1.0156 1-1/32 1.0313 Screw Size Close Fit Free Fit No. or Diameter Diameter Equivalent Drill Size Decimal Equivalent Drill Size Decimal Equivalent Clearance Hole Drill Chart The chart below displays a variety of common screw sizes and their clearance hole recommendations. The table provides two different class of fits, Close Fit PossibleWires. From Standard Sets. * 0.866. * 1.01. * 1.155. * 1.443. Once you know your wire diameter, you need to find out what is the premissable Measurement for your pitch diameter (Depending on the class). Use our Over Wire Calculator to find out! M18 X 1.5 : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance HaqS7N2.

1 2 npt thread drill size