| Nominal or standard fittings size, inches | Type | Male end | Female end | For use with tube size | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Outside diameter A | Length K | Inside diameter F | Depth G | under ASTM B 88 | under ASTM B 280 | under ASTM B 819 | under ASTM B 837 | |||||
| Min. | Max. | Min. | Min. | Max. | Min. | |||||||
| C = Cast, W = Wrought, * = Not commercially available | ||||||||||||
| 1⁄8 | W | .248 | .251 | .38 | .252 | .256 | .31 | * | 1⁄4 | * | 1⁄4 | |
| 1⁄4 | C | W | .373 | .376 | .38 | .377 | .381 | .31 | 1⁄4 | 3⁄8 | ¼ | 3⁄8 |
| 3⁄8 | C | W | .497 | .501 | .44 | .502 | .506 | .38 | 3⁄8 | 1⁄2 | 3⁄8 | 1⁄2 |
| 1⁄2 | C | W | .622 | .626 | .56 | .627 | .631 | .50 | 1⁄2 | 5⁄8 | 1⁄2 | 5⁄8 |
| 5⁄8 | W | .747 | .751 | .81 | .752 | .756 | .75 | 5⁄8 | 3⁄4 | 5⁄8 | 3⁄4 | |
| 3⁄4 | C | W | .872 | .876 | .81 | .877 | .881 | .75 | 3⁄4 | 7⁄8 | 3⁄4 | 7⁄8 |
| 1 | C | W | 1.122 | 1.127 | .97 | 1.128 | 1.132 | .91 | 1 | 11⁄8 | 1 | 11⁄8 |
| 11⁄4 | C | W | 1.372 | 1.377 | 1.03 | 1.378 | 1.382 | .97 | 11⁄4 | 13⁄8 | 11⁄4 | * |
| 11⁄2 | C | W | 1.621 | 1.627 | 1.16 | 1.628 | 1.633 | 1.09 | 11⁄2 | 15⁄8 | 11⁄2 | * |
| 2 | C | W | 2.121 | 2.127 | 1.41 | 2.128 | 2.133 | 1.34 | 2 | 21⁄8 | 2 | * |
| 21⁄2 | C | W | 2.621 | 2.627 | 1.53 | 2.628 | 2.633 | 1.47 | 21⁄2 | 25⁄8 | 21⁄2 | * |
| 3 | C | W | 3.121 | 3.127 | 1.72 | 3.128 | 3.133 | 1.66 | 3 | 31⁄8 | 3 | * |
| 31⁄2 | C | W | 3.621 | 3.627 | 1.97 | 3.628 | 3.633 | 1.91 | 31⁄2 | 35⁄8 | 31⁄2 | * |
| 4 | C | W | 4.121 | 4.127 | 2.22 | 4.128 | 4.133 | 2.16 | 4 | 41⁄8 | 4 | * |
| 5 | C | W | 5.121 | 5.127 | 2.72 | 5.128 | 5.133 | 2.66 | 5 | * | 5 | * |
| 6 | C | W | 6.121 | 6.127 | 3.22 | 6.128 | 6.133 | 3.09 | 6 | * | 6 | * |
| 8 | C | W | 8.119 | 8.127 | 4.09 | 8.128 | 8.133 | 3.97 | 8 | * | 8 | * |
| 10 | C | 10.119 | 10.127 | 4.12 | 10.128 | 10.133 | 4.00 | 10 | * | * | * | |
| 12 | C | 12.119 | 12.127 | 4.62 | 12.128 | 12.133 | 4.50 | 12 | * | * | * | |