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NPT 美制錐形螺紋

National Pipe Taper

螺紋分布在1:16的錐型上。通常需搭配止洩帶使用。

螺紋角：60°
稱呼方式：牙規-螺距 NPT
舉例：1/2"-14 NPT

螺紋規格公制.png
螺紋規格.png
螺紋稱呼
每寸螺紋數(TPI)
螺距Pitch
螺紋大徑D(mm)
螺紋小徑d(mm)
1/8 NPT
27
1.411
10.242
8.737
1/4 NPT
18
1.411
13.616
11.358
3/8 NPT
18
1.411
17.055
14.797
1/2 NPT
14
1.814
21.224
18.321
3/4 NPT
14
1.814
26.569
23.666
1 NPT
11.5
2.208
33.228
29.694
1.1/4 NPT
11.5
2.208
41.985
38.454
1.1/2 NPT
11.5
2.208
48.054
44.52
2 NPT
11.5
2.208
60.092
56.558
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