3 8 18 Npt Drill Size 3 8 nominal pipe size 18 number of threads per inch NPT symbol for the thread series and form i e National American Standard Pipe Taper Basic dimensions are given to four or five decimal places to eliminate errors when calculating gauge dimensions they do not imply a greater degree of precision than is normally obtainable
3 8 18 NPT Pipe and Fitting Thread Dimensions and Tolerances All the relevant data for this tread in one spot Drill sizes for Briggs Standard Pipe taps for direct tapping without reaming are indicated below Pipe tube and fittings sizes and dimensions Inside and outside diameters weights and more Thread data metric unified ACME and others NPS pressure tight straight pipe threads with lubricant or sealer
3 8 18 Npt Drill Size
3 8 18 Npt Drill Size
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Data Charts Eagle Rock Specialties
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TAP DRILL SIZE CHART FOR NPT THREADS National Pipe Threads NPT Size Tap Drill Size in Decimal in 1 16 27 C 0 242 1 8 27 Q 0 332 1 4 18 7 16 0 438 3 8 18 9 16 0 562 1 2 14 45 64 0 703 3 4 14 29 32 0 906 1 0 11 1 Thread Designation The nominal pipe size number of threads per inch and the thread series symbol in sequence Ex 3 8 18 NPT For additional dimensions see NPT Pipe Thread Calculator
Commonly used sizes are 1 8 1 4 3 8 1 2 3 4 1 1 1 4 1 1 2 and 2 inch appearing on pipes and fittings by most U S suppliers NPT stands for National Pipe Tapered threads The basic profile is a 60 truncated triangle similar to the Unified Inch threads UNC UNF The main difference is that the thread profile is tapered at an angle of 1 47 0 75 in ft or 62 5 mm m relative to the axis
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Drill Size inch 0 80 3 64 1 64 0 059 53 72 0 059 53 2 56 0 067 51 64 0 070 50 M39 4 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 1 4 187 16 29 64 3 8 18 9 16 18 19 32 1 2 14 45 64 14 47 NPT Thread Chart Tap Drill Size Calculator for recommended drill and tapped hole sizes according to ASME B1 20 1 Pipe Threads General Purpose Inch standard The drill size shown by the calculator is the diameter of the standard drill which is the closest to the minimum minor diameters of the pipe thread
Refer to this table to determine the tap drill sizes for National Pipe Threads both NPT National Pipe Taper NPS National Pipe Straight 3 8 18 NPT Basic Thread Dimensions Pitch minor major diameters depth lead Tolerance range for all applicable classes and much more
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https://torqbolt.com/npt-threads-national-tapered...
3 8 nominal pipe size 18 number of threads per inch NPT symbol for the thread series and form i e National American Standard Pipe Taper Basic dimensions are given to four or five decimal places to eliminate errors when calculating gauge dimensions they do not imply a greater degree of precision than is normally obtainable

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3 8 18 NPT Pipe and Fitting Thread Dimensions and Tolerances All the relevant data for this tread in one spot

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3 8 18 Npt Drill Size - Commonly used sizes are 1 8 1 4 3 8 1 2 3 4 1 1 1 4 1 1 2 and 2 inch appearing on pipes and fittings by most U S suppliers