UNS Thread ASME B1.1-2003
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- Specifications
- 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
- Bodmer Thread
- French Thread
- VDI Thread
- Ducommun Steinle Thread
- Hamann Patronen Thread
- Thury Thread
- 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)
- 16-UN Thread (USA)
- 20-UN Thread (USA)
- NPT Thread (USA)
- NPTF Thread (USA)
- NPSC Thread (USA)
- NPSF Thread (USA)
- NPSL Thread (USA)
- NPSM Thread (USA)
- ACME Thread (USA)
- 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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UNS - Unified Special Thread Series, which is used for special purposes.
The flank angle is 60°.
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| Nominal Diameter | Major Diameter Inch | Major Diameter mm | Tapping Drill Size mm | TPI | Pitch mm |
| 10 - 28 UNS | 0.1900 | 4.826 | 3.95 | 28 | 0.907 |
| 10 - 36 UNS | 0.1900 | 4.826 | 4.15 | 36 | 0.706 |
| 10 - 40 UNS | 0.1900 | 4.826 | 4.20 | 40 | 0.635 |
| 10 - 48 UNS | 0.1900 | 4.826 | 4.35 | 48 | 0.529 |
| 10 - 56 UNS | 0.1900 | 4.826 | 4.39 | 56 | 0.454 |
| 12 - 36 UNS | 0.2160 | 5.486 | 4.80 | 36 | 0.706 |
| 12 - 40 UNS | 0.2160 | 5.486 | 4.90 | 40 | 0.635 |
| 12 - 48 UNS | 0.2160 | 5.486 | 4.98 | 48 | 0.529 |
| 12 - 56 UNS | 0.2160 | 5.486 | 5.05 | 56 | 0.454 |
| 1/4" - 24 UNS | 0.2500 | 6.350 | 5.35 | 24 | 1.058 |
| 1/4" - 27 UNS | 0.2500 | 6.350 | 5.45 | 27 | 0.941 |
| 1/4" - 36 UNS | 0.2500 | 6.350 | 5.70 | 36 | 0.706 |
| 1/4" - 40 UNS | 0.2500 | 6.350 | 5.75 | 40 | 0.635 |
| 1/4" - 48 UNS | 0.2500 | 6.350 | 5.85 | 48 | 0.529 |
| 1/4" - 56 UNS | 0.2500 | 6.350 | 5.95 | 56 | 0.454 |
| 5/16" - 27 UNS | 0.3125 | 7.938 | 7.10 | 27 | 0.941 |
| 5/16" - 36 UNS | 0.3125 | 7.938 | 7.25 | 36 | 0.706 |
| 5/16" - 40 UNS | 0.3125 | 7.938 | 7.40 | 40 | 0.635 |
| 5/16" - 48 UNS | 0.3125 | 7.938 | 7.50 | 48 | 0.529 |
| 3/8" - 18 UNS | 0.3750 | 9.525 | 8.20 | 18 | 1.411 |
| 3/8" - 27 UNS | 0.3750 | 9.525 | 8.70 | 27 | 0.941 |
| 3/8" - 36 UNS | 0.3750 | 9.525 | 8.90 | 36 | 0.706 |
| 3/8" - 40 UNS | 0.3750 | 9.525 | 9.00 | 40 | 0.635 |
| 0,390" - 27 UNS | 0.3900 | 9.906 | 9.00 | 27 | 0.941 |
| 7/16" - 18 UNS | 0.4375 | 11.112 | 9.75 | 18 | 1.411 |
| 7/16" - 24 UNS | 0.4375 | 11.112 | 10.10 | 24 | 1.058 |
| 7/16" - 27 UNS | 0.4375 | 11.112 | 10.20 | 27 | 0.941 |
| 1/2" - 12 UNS | 0.5000 | 12.700 | 10.75 | 12 | 2.117 |
| 1/2" - 14 UNS | 0.5000 | 12.700 | 11.00 | 14 | 1.814 |
| 1/2" - 18 UNS | 0.5000 | 12.700 | 11.40 | 18 | 1.411 |
| 1/2" - 24 UNS | 0.5000 | 12.700 | 11.70 | 24 | 1.058 |
| 1/2" - 27 UNS | 0.5000 | 12.700 | 11.85 | 27 | 0.941 |
| 9/16" - 14 UNS | 0.5625 | 14.288 | 12.60 | 14 | 1.814 |
| 9/16" - 27 UNS | 0.5625 | 14.288 | 13.40 | 27 | 0.941 |
| 5/8" - 14 UNS | 0.6250 | 15.875 | 14.20 | 14 | 1.814 |
| 5/8" - 27 UNS | 0.6250 | 15.875 | 15.00 | 27 | 0.941 |
| 3/4" - 14 UNS | 0.7500 | 19.050 | 17.40 | 14 | 1.814 |
| 3/4" - 18 UNS | 0.7500 | 19.050 | 17.75 | 18 | 1.411 |
| 3/4" - 24 UNS | 0.7500 | 19.050 | 18.10 | 24 | 1.058 |
| 3/4" - 27 UNS | 0.7500 | 19.050 | 18.20 | 27 | 0.941 |
| 7/8" - 10 UNS | 0.8750 | 22.225 | 19.75 | 10 | 2.540 |
| 7/8" - 18 UNS | 0.8750 | 22.225 | 21.00 | 18 | 1.411 |
| 7/8" - 24 UNS | 0.8750 | 22.225 | 21.20 | 24 | 1.058 |
| 7/8" - 27 UNS | 0.8750 | 22.225 | 21.40 | 27 | 0.941 |
| 1" - 10 UNS | 1.0000 | 25.400 | 23.00 | 10 | 2.540 |
| 1" - 14 UNS | 1.0000 | 25.400 | 23.75 | 14 | 1.814 |
| 1" - 18 UNS | 1.0000 | 25.400 | 24.25 | 18 | 1.411 |
| 1" - 24 UNS | 1.0000 | 25.400 | 24.50 | 24 | 1.058 |
| 1" - 27 UNS | 1.0000 | 25.400 | 24.50 | 27 | 0.941 |
| 1 1/8" - 10 UNS | 1.1250 | 28.575 | 26.25 | 10 | 2.540 |
| 1 1/8" - 14 UNS | 1.1250 | 28.575 | 27.00 | 14 | 1.814 |
| 1 1/8" - 24 UNS | 1.1250 | 28.575 | 27.75 | 24 | 1.058 |
| 1 1/4" - 10 UNS | 1.2500 | 31.750 | 29.50 | 10 | 2.540 |
| 1 1/4" - 14 UNS | 1.2500 | 31.750 | 30.00 | 14 | 1.814 |
| 1 1/4" - 24 UNS | 1.2500 | 31.750 | 30.75 | 24 | 1.058 |
| 1 3/8" - 10 UNS | 1.3750 | 34.925 | 32.60 | 10 | 2.540 |
| 1 3/8" - 14 UNS | 1.3750 | 34.925 | 33.30 | 14 | 1.814 |
| 1 1/2" - 10 UNS | 1.5000 | 38.100 | 35.70 | 10 | 2.540 |
| 1 1/2" - 14 UNS | 1.5000 | 38.100 | 36.50 | 14 | 1.814 |
| 1 1/2" - 24 UNS | 1.5000 | 38.100 | 37.30 | 24 | 1.058 |
| 1 5/8" - 10 UNS | 1.6250 | 41.275 | 39.00 | 10 | 2.540 |
| 1 5/8" - 14 UNS | 1.6250 | 41.275 | 39.50 | 14 | 1.814 |
| 1 5/8" - 24 UNS | 1.6250 | 41.275 | 40.35 | 24 | 1.058 |
| 1 3/4" - 10 UNS | 1.7500 | 44.450 | 42.00 | 10 | 2.540 |
| 1 3/4" - 14 UNS | 1.7500 | 44.450 | 42.85 | 14 | 1.814 |
| 1 3/4" - 18 UNS | 1.7500 | 44.450 | 43.25 | 18 | 1.411 |
| 1 7/8" - 10 UNS | 1.8750 | 47.625 | 45.30 | 10 | 2.540 |
| 1 7/8" - 14 UNS | 1.8750 | 47.625 | 46.00 | 14 | 1.814 |
| 1 7/8" - 18 UNS | 1.8750 | 47.625 | 46.35 | 18 | 1.411 |
| 2" - 10 UNS | 2.0000 | 50.800 | 48.40 | 10 | 2.540 |
| 2" - 14 UNS | 2.0000 | 50.800 | 49.25 | 14 | 1.814 |
| 2" - 18 UNS | 2.0000 | 50.800 | 49.50 | 18 | 1.411 |
| 2 1/16" - 16 UNS | 2.0625 | 52.387 | 51.00 | 16 | 1.587 |
| 2 3/16" - 16 UNS | 2.1875 | 55.563 | 54.10 | 16 | 1.587 |
| 2 1/4" - 10 UNS | 2.2500 | 57.150 | 54.75 | 10 | 2.540 |
| 2 1/4" - 14 UNS | 2.2500 | 57.150 | 55.50 | 14 | 1.814 |
| 2 1/4" - 18 UNS | 2.2500 | 57.150 | 55.75 | 18 | 1.411 |
| 2 5/16" - 16 UNS | 2.3125 | 58.737 | 57.30 | 16 | 1.587 |
| 2 7/16" - 16 UNS | 2.4375 | 61.912 | 60.50 | 16 | 1.587 |
| 2 1/2" - 10 UNS | 2.5000 | 63.500 | 61.20 | 10 | 2.540 |
| 2 1/2" - 14 UNS | 2.5000 | 63.500 | 61.75 | 14 | 1.814 |
| 2 1/2" - 18 UNS | 2.5000 | 63.500 | 62.30 | 18 | 1.411 |
| 2 3/4" - 10 UNS | 2.7500 | 69.850 | 67.50 | 10 | 2.540 |
| 2 3/4" - 14 UNS | 2.7500 | 69.850 | 68.25 | 14 | 1.814 |
| 2 3/4" - 18 UNS | 2.7500 | 69.850 | 68.50 | 18 | 1.411 |
| 3" - 10 UNS | 3.0000 | 76.200 | 73.80 | 10 | 2.540 |
| 3" - 14 UNS | 3.0000 | 76.200 | 74.50 | 14 | 1.814 |
| 3" - 18 UNS | 3.0000 | 76.200 | 75.00 | 18 | 1.411 |
| 3 1/4" - 10 UNS | 3.2500 | 82.550 | 80.25 | 10 | 2.540 |
| 3 1/4" - 14 UNS | 3.2500 | 82.550 | 81.00 | 14 | 1.814 |
| 3 1/4" - 18 UNS | 3.2500 | 82.550 | 81.25 | 18 | 1.411 |
| 3 1/2" - 10 UNS | 3.5000 | 88.900 | 86.55 | 10 | 2.540 |
| 3 1/2" - 14 UNS | 3.5000 | 88.900 | 87.25 | 14 | 1.814 |
| 3 1/2" - 18 UNS | 3.5000 | 88.900 | 87.60 | 18 | 1.411 |
| 3 3/4" - 10 UNS | 3.7500 | 95.250 | 93.00 | 10 | 2.540 |
| 3 3/4" - 14 UNS | 3.7500 | 95.250 | 93.60 | 14 | 1.814 |
| 3 3/4" - 18 UNS | 3.7500 | 95.250 | 94.00 | 18 | 1.411 |
| 4" - 10 UNS | 4.0000 | 101.600 | 99.30 | 10 | 2.540 |
| 4" - 14 UNS | 4.0000 | 101.600 | 100.00 | 14 | 1.814 |
| 4 1/4" - 10 UNS | 3.2500 | 107.950 | 105.60 | 10 | 2.540 |
| 4 1/4" - 14 UNS | 4.2500 | 107.950 | 106.30 | 14 | 1.814 |
| 4 1/2" - 10 UNS | 4.5000 | 114.300 | 112.00 | 10 | 2.540 |
| 4 1/2" - 14 UNS | 4.5000 | 114.300 | 112.65 | 14 | 1.814 |
| 4 3/4" - 10 UNS | 4.7500 | 120.650 | 118.35 | 10 | 2.540 |
| 4 3/4" - 14 UNS | 4.7500 | 120.650 | 119.00 | 14 | 1.814 |
| 5" - 10 UNS | 5.0000 | 127.000 | 124.70 | 10 | 2.540 |
| 5" - 14 UNS | 5.0000 | 127.000 | 125.35 | 14 | 1.814 |
| 5 1/4" - 10 UNS | 5.2500 | 133.350 | 131.00 | 10 | 2.540 |
| 5 1/4" - 14 UNS | 5.2500 | 133.350 | 131.70 | 14 | 1.814 |
| 5 1/2" - 10 UNS | 5.5000 | 139.700 | 137.40 | 10 | 2.540 |
| 5 1/2" - 14 UNS | 5.5000 | 139.700 | 138.00 | 14 | 1.814 |
| 5 3/4" - 10 UNS | 5.7500 | 146.050 | 143.75 | 10 | 2.540 |
| 5 3/4" - 14 UNS | 5.7500 | 146.050 | 144.40 | 14 | 1.814 |
| 6" - 10 UNS | 6.0000 | 152.400 | 150.00 | 10 | 2.540 |
| 6" - 14 UNS | 6.0000 | 152.400 | 150.75 | 14 | 1.814 |
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