Tabella di conversione: pollici a mm
| Pollici | mm | Pollici | mm | Pollici | mm | Pollici | mm |
|---|---|---|---|---|---|---|---|
| 1/16" | 1,5875 | 5/16" | 7,9375 | 9/16" | 14,2875 | 13/16" | 20,6375 |
| 1/8" | 3,1750 | 3/8" | 9,5250 | 5/8" | 15,875 | 7/8" | 22,225 |
| 3/16" | 4,7225 | 7/16" | 11,1125 | 11/16" | 17,4625 | 15/16" | 23,8125 |
| 1/4" | 6,35 | 1/2" | 12,7 | 3/4" | 19,05 | 1" | 25,40 |
Tabella di conversione: diametri nominali
| Int. in inglese inch | mm EXT INT | Int. in pollici inglesi | mm EXT INT | Int. in pollici | mm EXT INT | Int. in inglese in pollici | mm EXT INT |
|---|---|---|---|---|---|---|---|
| 1/8" | 10 5 | 1" | 34 26 | 2" 1/2 | 76 66 | 4" 1/2 | 127 114 |
| 1/4" | 13 8 | 1" 1/4 | 42 33 | 2" 3/4 | 82 72 | 5 " | 140 127 |
| 3/8" | 17 12 | 1" 1/2 | 49 40 | 3" | 90 80 | 5" 1/2 | 152 140 |
| 1/2" | 21 15 | 2 " | 60 50 | 3" 1/2 | 102 90 | 6 " | 165 152 |
| 3/4" | 27 20 | 2" 1/4 | 70 60 | 4" | 114 102 |
Tabella di conversione: designazione delle filettature del gas
| Nominale in pollici | Designazione comune | Filettatura esterna "teorica |
|---|---|---|
| 1/8 | 5 x 10 | 9,72 |
| 1/4 | 8 x 13 | 13,15 |
| 3/8 | 12 x 17 | 16,66 |
| 1/2 | 15 x 21 | 20,95 |
| 5/8 | 17 x 23 | 22,91 |
| 3/4 | 20 x 27 | 26,44 |
| 7/8 | 24 x 31 | 30,20 |
| 1" | 26 x 34 | 33,24 |
| 1" 1/4 | 33 x 42 | 41,91 |
| 1" 1/2 | 40 x 49 | 47,80 |
| 1" 3/4 | 46 x 55 | 53,74 |
| 2" | 50 x 60 | 59,61 |
| 2" 1/4 | 60 x 70 (vecchio standard) | 69,30 |
| 2" 1/2 | 66 x 76 | 75,18 |
| 2" 3/4 | 72 x 82 | 81,53 |
| 3" | 80 x 90 | 87,88 |
| 3" 1/2 | 90 x 102 | 100,33 |
| 4" | 102 x 114 | 113,03 |