NPSF American Pipe Thread
ANSI B 1.20.1
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- ISO Coarse Thread (metric) DIN 13-1
- ISO Fine Thread I (metric) DIN 13-2
- ISO Fine Thread II (metric) DIN 13-3
- ISO Fine Thread III (metric) DIN 13-4
- ISO Fine Thread IV (metric) DIN 13-5
- ISO Fine Thread V (metric) DIN 13-6
- ISO Fine Thread VI (metric) DIN 13-7
- ISO Fine Thread VII (metric) DIN 13-8
- ISO Fine Thread VIII (metric) DIN 13-9
- ISO Fine Thread IX (metric) DIN 13-10
- ISO Fine Thread X (metric) DIN 13-11
- ISO Thread (metric)
DIN 14-2 - Knuckle Thread DIN 405
- Knuckle Thread
DIN 20400 - Buttress Fine Thread DIN 514
- Buttress Coarse Thread DIN 513
- Buttress Thread 45°
DIN 2781 - Trapezoidal Fine Thread DIN 103
- Trapezoidal Coarse Thread DIN 103
- Valve Thread DIN 7756
- Cycle Thread DIN 79012
- PG Thread DIN 40430
- Pipe Thread DIN 158
- Dairy Thread DIN 11851
- Edison Thread
DIN 40400 - Glass Thread DIN 40450
- Knuckle Thread for glass containers DIN 168
- Threads for plastic containers DIN 6063
- Camera mount Thread
- S. & H. Thread
- Sewing-machine Thread
- C. E. I. Thread
- Löwenherz Thread
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- French Thread
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- Hamann Patronen Thread
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- Whitworth Instrument Thread
- Whitworth Fine DIN 239
- Whitworth Fine DIN 240
- Whitworth Fine
DIN LON 282 - Whitworth Fine
DIN LON special - Whitworth Fine
DIN LON 286 - Whitworth Fine
DIN LON 287 - S. J. Thread
- Sellers Thread
- UNC Thread (USA)
- UNEF Thread (USA)
- UNF Thread (USA)
- UNM Thread (USA)
- UNR Thread (USA)
- UNS Thread (USA)
- 8-UN Thread (USA)
- 12-UN Thread (USA)
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- 20-UN Thread (USA)
- NPT Thread (USA)
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- NPSC Thread (USA)
- ► NPSF Thread (USA)
- NPSL Thread (USA)
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- STUB ACME Thread (USA)
- Sharp V Thread (USA)
- ME Model Engineer Thread (GB)
- BA British Association (GB)
- BSB British Standard Brass (GB)
- BSF Whitworth Fine Thread (GB)
- BSW Whitworth Coarse Thread (GB)
- BSPP Whitworth Pipe Thread (GB)
- BSPT Tapered Whitworth Pipe Thread (GB)
- Conversion Inch-Fractions to mm
- Conversion TPI to pitch mm
- Drill bit sizes
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The parallel, internal thread National Pipe Straight Fuel is coupled with tapered, external National Pipe Taper without use of a sealant.
The flank angle is 60°.
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| Nominal Diameter | Major Diameter mm | Tapping Drill Size mm | TPI | Pitch mm |
| 1/16" - 27 NPSF | 7.582 | 6.304 | 27 | 0.940 |
| 1/8" - 27 NPSF | 9.929 | 8.651 | 27 | 0.940 |
| 1/4" - 18 NPSF | 13.236 | 11.232 | 18 | 1.411 |
| 3/8" - 18 NPSF | 16.673 | 14.671 | 18 | 1.411 |
| 1/2" - 14 NPSF | 20.819 | 18.118 | 14 | 1.814 |
| 3/4" - 14 NPSF | 26.166 | 23.465 | 14 | 1.814 |
| 1" - 11 1/2 NPSF | 32.718 | 29.464 | 11.5 | 2.209 |
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