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. The angle between the taper and the center axis of the pipe is 1° 47'′ 24"″ (1.7899°).

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.

NPT Thread Chart for basic dimensions of general purpose NPT pipe threads (inch) according to ANSI/ASME B1.20.1 standard. Thd. Note: The dimensions of the NPT Thread are given to four or five decimal places.

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.

NPT - National Pipe Thread Tapered - is a U.S. standard for tapered threads used to join pipes and fittings is defined by ANSI B1.20.1 Pipe Threads, General Purpose, Inch

For interpertations of the terms scroll down to the drawings below the table. ... 1/2-14 NPT : Pipe and Fitting Thread Dimensions and Tolerances. All the relevant data for this tread in one spot.

2025年3月10日 · This NPT Thread Size Chart provides specifications for various nominal pipe sizes, including outside diameter, threads per inch (TPI), pitch, taper rate, thread length, effective thread length, and hand-tight engagement length.

NPT consists of both internal and external taper threads that are intended to be wrenched with a sealant to create a pressure-tight joint. These threads have a taper of 1 inch per 16 inches of length— meaning that the diameter measured diametrically relative to the axis decreases by 1/16 inch for every inch of length.

National Pipe Thread (NPT) is a family of technical standards for threads that has been adopted internationally for interconnecting hoses and fittings by mating an external (male) thread with an internal (female) thread. National Pipe Threads are similar in function to BSP threads, but are not generally interchangeable.

2025年1月16日 · The NPT chart details the dimensions of tapered threads used in pipes and fittings. These threads ensure a tight seal, preventing leaks in fluid and gas systems. The taper on the threads allows them to compress as they are tightened, creating a secure connection.