Hrdlo T spojky ČSN 137890
| Vnější ø trubky d9 | d1 | d10 | L | S | Označení | Objednací číslo |
| 4 | M10x1 | 3 | 16 | 9 | M-HST Js3 L | 789003 |
| 5 | M10x1 | 4 | 16 | 9 | M-HST Js4 L | 789004 |
| 6 | M12x1,5 | 4 | 19 | 12 | M-HST 06 L | 789030 |
| 6 | M12x1,5 | 5 | 19 | 10 | M-HST Js5 L | 789005 |
| 8 | M14x1,5 | 6 | 21 | 12 | M-HST Js6 L | 789006 |
| 8 | M14x1,5 | 6 | 21 | 12 | M-HST 08 L | 789031 |
| 10 | M16x1,5 | 8 | 23 | 14 | M-HST Js8 L | 789008 |
| 10 | M16x1,5 | 8 | 22 | 14 | M-HST 10 L | 789032 |
| 12 | M18x1,5 | 9 | 25 | 17 | M-HST Js10 L | 789010 |
| 12 | M18x1,5 | 10 | 24 | 17 | M-HST 12 L | 789033 |
| 15 | M22x1,5 | 12 | 28 | 19 | M-HST 15 L | 789034 |
| 16 | M22x1,5 | 12 | 28 | 19 | M-HST Js13 L | 789013 |
| 18 | M26x1,5 | 15 | 31 | 24 | M-HST 18 L | 789035 |
| 18 | M27x1,5 | 15 | 34 | 24 | M-HST Js15 L | 789015 |
| 22 | M30x1,5 | 18 | 38 | 27 | M-HST Js20 L | 789020 |
| 22 | M30x2 | 19 | 35 | 27 | M-HST 22 L | 789036 |
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