1 8 npt nut size Applications and Design National Standard Taper Pipe Threads Size NPT Chart Includes both External and internal Pipe Thread Data The taper rate for all NPT threads is 1 16 3 4 inch per foot measured by the change of diameter of the pipe thread over distance
2 1 2 8 NPT 2 1 2 2 8750 8 0 1250 2 71953 0 68200 2 76216 1 57120 1 13750 0 43380 0 100000 0 108253 2 61950 2 76216 2 79062 2 77500 Metric Values Tolerances 3 8 NPT 3 3 5000 8 0 1250 3 34062 0 76600 3 38850 1 63370 1 20000 0 43380 0 100000 0 108253 3 24060 3 38850 3 41562 3 40000 Metric Values 8 0 12500 10 54531 1 210 9 68 10 62094 1 9250 15 40 10 66562 2 3587 10 4453 12 12 750 8 0 12500 12 53281 1 360 10 88 12 61781 2 1250 17 00 12 66562 2 5587 12 4328 14 o d 14 000 8 0 12500 13 77500 1 562 12 50 13 87262 2 2500 18 00 13 91562 2 6837 13 6750 16 o d 16 000 8 0 12500 15 76250 1 812 14 50
1 8 npt nut size
1 8 npt nut size
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AN NPT AN8 NPT1 4 EMOTION
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1 8 Straight NPT Brass Lock Nut
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National Standard Taper Pipe NPT Threads Size Chart 1 16 0 3125 27 0 16 0 2611 1 8 0 405 27 0 18 4 2 0 26 1 4 0 54 18 0 2 4 3 0 401 3 8 0 675 18 0 24 4 3 0 408 1 2 0 84 14 0 32 4 3 0 534 3 4 1 05 14 0 34 4 3 0 546 1 1 315 11 5 0 4 4 3 0 682 1 1 66 11 5 0 42 4 3 0 707 1 1 9 11 5 0 42 4 3 0 724 2 2 375 11 5 0 436 5 3 0 NPT Thread Sizes Commonly used NPT thread sizes including 1 8 1 4 3 8 1 2 3 4 1 1 1 4 1 1 2 2 2 1 2 3 4 5 and 6 inches can be found on most U S pipes and fittings The thread sizes smaller than 1 8 inch and larger than 6 inches are occasionally used for specific purposes
NPT Threads Taps and Drill Sizes Size Taps inches TPI Size Drill inches 1 8 27 21 64 1 4 18 27 64 3 8 18 9 16 1 2 14 11 16 3 4 14 29 32 1 11 5 1 1 8 1 1 4 11 5 1 15 32 1 1 2 11 5 1 23 32 2 11 5 2 3 16 2 1 2 1 inch 25 4 mm NPT threads are not interchangeable with NPS National Pipe Straight threads Example Typical Designation of NPT thread 1 8 27 NPT NPT threads may look similar to ISO 7 1 threads However ISO and NPT threads should not be mixed ISO threads have 55 o taper angle versus 60 o for NPT The NPT root and crest
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NPT Thread Calculator for NPT thread dimensions according to ANSI ASME B1 20 1 standard For left hand threads include LH to the designation Example 1 4 18 NPT LH For pressure tight joints it is intended that taper pipe threads be NPT threads come in various nominal pipe sizes ranging from 1 16 to 24 inches Take note that the nominal pipe size is roughly related to the inside diameter of the Schedule 40 pipe series and not to any of the actual diameters of the NPT threads which are typically larger than the nominal pipe size
Choose from our selection of NPT nuts in a wide range of styles and sizes In stock and ready to ship Choose from our selection of 1 8 NPT pipe fittings in a wide range of styles and sizes In stock and ready to ship
Stainless Steel Pipe Fitting Adapter 1 4 In Female NPT X 1 4 In
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1 8 npt nut size - Dry seal thread NPTF allows for joining without sealants Female NPT threads may be designated as FPT Male NPT threads may be designated as MPT The pipe size is often written such as this 1 8 27 with a hyphen between size thread per inch and pronounced as one eighth twenty seven