National Pipe Tapered Thread Series NPT/NPTF
National Pipe Tapered Thread Series(NPT/NPTF)
| Size | Pitch mm |
Basic Diameter mm |
Thread Length mm |
Shank Diameter mm |
No. of Flutes | Overall Length mm |
Welded(W)/ Tungsten(T) | ||
| 1/16 | NPT NPTF |
27 | 0.9407 | 7.895 | 18 | 6.5 | 4 | 55 | T |
| 1/8 | NPT NPTF |
27 | 0.9407 | 10.242 | 19 | 8 | 4 | 58 | T |
| 1/4 | NPT NPTF |
18 | 1.4111 | 13.572 | 24 | 11 | 4 | 62 | T |
| 3/8 | NPT NPTF |
18 | 1.4111 | 17.055 | 24 | 14/22.225 | 4 | 75 | W |
| 1/2 | NPT NPTF |
14 | 1.8143 | 21.223 | 26 | 20/22.225 | 4 | 85 | W |
| 3/4 | NPT NPTF |
14 | 1.8143 | 26.568 | 26 | 20/22.225 | 4 | 85 | W |
| 1” | NPT NPTF |
11 1/2 | 2.2087 | 33.228 | 26 | 25/22.225 | 4 | 90 | W |
| 1”1/4 | NPT NPTF |
11 1/2 | 2.2087 | 41.985 | 26 | 31.75/22.225 | 4 | 90 | W |
| 1”1/2 | NPT NPTF |
11 1/2 | 2.2087 | 48.054 | 26 | 38 | 6 | 90 | W |
| 2” | NPT NPTF |
11 1/2 | 2.2087 | 60.092 | 35 | 46 | 6 | 95 | W |
| 2”1/2 | NPT NPTF |
8 | 3.1750 | 72.699 | 35 | 55 | 8 | 95 | W |
| 3” | NPT NPTF |
8 | 3.1750 | 88.608 | 35 | 65 | 8 | 95 | W |
| 3”1/2 | NPT NPTF |
8 | 3.1750 | 101.316 | 35 | 70 | 8 | 95 | W |
| 4” | NPT NPTF |
8 | 3.1750 | 113.973 | 35 | 75 | 10 | 95 | W |
| 5” | NPT NPTF |
8 | 3.1750 | 140.952 | 35 | 90 | 10/12 | 95 | W |
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