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°).

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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

木螺钉技术条件 小螺纹 - 5h3 外螺纹极限尺寸 小螺纹 - 4H5 4H6 内螺纹极限尺寸 小螺纹 - 3G5 3G6 内螺纹极限尺寸 小螺纹：牙型尺寸 小螺纹 - 直径与螺距系列和基本尺寸 梯形螺纹 - 设计牙型 梯形螺纹 - 基本牙型 ST 自攻螺纹 NPT 圆锥管螺纹的基本尺寸

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.

1/16" NPT Radiator Aluminum Overflow Nipple Barb Hose Fitting for Universal Radiators Oil Tank

1.NPT螺纹是National (American) Pipe Thread的缩写，属于美国标准的60度锥管螺纹，用于北美地区．国家标准可查阅GB/T12716-1991。 2.PT螺纹是Pipe Thread的缩写，是55度密封圆锥管螺纹，属惠氏螺纹家族，多用于欧洲及英联邦国家,常用于水及煤气管行业，锥度规定为1:16．国家 ...

Minimum = 0.033P for all pitches. See table for maximum. When using L1 gauges to check threads, the thread is within permissible tolerance if the ring gauge face, or plug gauge notch, …

1/16-27 NPT : Pipe and Fitting Thread Dimensions and Tolerances. All the relevant data for this tread in one spot

npt螺纹 锥度 1:16是 管螺纹标准 的一种。 管螺纹标准来源于英制 惠氏 螺纹，是衡量管螺纹大小的基本尺寸。 通常按1/16锥度关系，惠氏螺纹的径向直径公差转化为英制密封管螺纹的轴向牙数公差。