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1/2-14 NPT : Pipe and Fitting Thread Dimensions and Tolerances. All the relevant data for this tread in one spot.
1/2-14 NPT : Basic Thread Dimensions (Pitch, minor & major diameters, depth, lead), Tolerance range for all applicable classes and much more.
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.
The Jargon, calculations, and charts that define NPT threads are very different compared with standard metric and inch threads. This webpage will explain the difference between the various series, how each parameter is defined, and show how to find the correct basic dimensions and tolerances for each thread.
NPT Thread Chart for basic dimensions of general purpose NPT pipe threads (inch) according to ANSI/ASME B1.20.1 standard. American National Standard Taper Pipe Thread (NPT) Chart. Note: The dimensions of the NPT Thread are given to four or five decimal places.
For example: “¾-14 NPT” specifies a National Pipe Taper thread with a nominal pipe size of ¾ and a pitch of 14 threads per inch. “½-14 NPSM LH” specifies a left-handed National Pipe Straight Mechanical thread with a nominal pipe size of ½ and a pitch of 14 threads per inch.
6200, 6300 & R Series Ball Bearing Dimensions & Sizes Chart. Origins of NPT Threads. The origins of NPT threads can be traced back to the 19th century in the United States, a time when industrialization was in full swing, and the need for standardized pipe fittings became increasingly apparent.
