3 8 npt thread dimensions 3 8 npt 8 3 3885 3 3984 3 334 3 353 3 1 2 8 npt 8 3 8888 3 8988 3 835 3 848 4 8 npt 8 4 3871 4 3971 4 333 4 346 5 8 npt 8
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 3 8 18 NPT Internal Fitting Basic Thread Dimensions For interpertations of the terms scroll down to the drawings below the table Property Inch mm Nominal Pipe Size 3 8
3 8 npt thread dimensions
3 8 npt thread dimensions
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Npt Thread Dimensions Chart
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NPTF Thread Fitting Size Chart Knowledge Yuyao Jiayuan Hydraulic
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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 The angle between the taper and the center axis of the pipe is 1 47 24 1 7899 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 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
A 3 4 NPT pipe thread has an outside diameter OD of 1 050 inches Each thread size has a defined number of threads per inch TPI or pitch The 3 4 NPT pipe thread has 14 threads per inch Both the TPI and OD of the thread are required for positive identification of thread size because more than one size have the same TPI 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 0 756
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Threads per Inch 1 1 8 in 13 32 0 410 3 8 0 380 27 2 1 4 in 17 32 0 540 1 2 0 490 18 3 3 8 in 11 16 0 680 5 8 0 630 18 4 1 2 in 27 32 0 840 25 32 0 770 14 5 3 4 in 1 1 16 1 050 1 0 980 14 6 1 in 1 5 16 1 320 1 1 4 1 240 11 5 Hardness Conversion Calculator 3 8 NPT Pipe and Fitting Thread Dimensions and Tolerances All the relevant data for this tread in one spot
The E 3 dimensions are then as follows Size 21 2 in 2 69609 and size 3 in 3 31719 The basic dimensions of the ANSI Standard Taper Pipe Thread are given in inches to four or five decimal places Example designation 3 8 18 NPT where 3 8 nominal pipe size 18 number of threads per inch Tolerances When using L1 gauges to check threads the thread is within permissible tolerance if the ring gauge face or plug gauge notch is 1 turn from being flush with the end of the thread
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3 8 npt thread dimensions - 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