SQ Head Plug
| INCH | MM | A | B | C |
| 1/8" | 6 | 9.5 | 6.5 | 7.4 |
| 1/4" | 8 | 12.0 | 7.5 | 8.2 |
| 3/8" | 10 | 12.8 | 8.2 | 10.0 |
| 1/2" | 15 | 15.0 | 10.0 | 11.5 |
| 3/4" | 20 | 17.0 | 11.0 | 12.8 |
| 1" | 25 | 19.5 | 13.0 | 16.0 |
| 1.1/4" | 32 | 20.6 | 14.5 | 19.0 |
| 1.1/2" | 40 | 21.6 | 16.0 | 23.0 |
| 2" | 50 | 22.6 | 17.5 | 26.6 |
| 2.1/2" | 65 | 28.0 | 18.0 | 32.0 |
| 3" | 80 | 28.9 | 21.0 | 35.0 |
| 4" | 100 | 38.5 | 26.0 | 44.5 |
| 6" | 150 | 41.5 | 30.0 | 66.5 |