Is uirlisí riachtanacha iad Clocha Láimhe a chuirtear i bhfeidhm chun píopaí a dhéanamh suas agus a bhriseadh amach. de bharr athrú gialla lug agus céimeanna latch .
Is féidir méideanna láimhseála éagsúla na tlúnna a choigeartú Déantar iad a dhearadh agus a mhonarú de réir
Sonraíocht API Spec 7K maidir le trealamh druileála agus seirbhísithe tobair.
| Líon na ngiall Lug Latch | Líon Poll Bioráin Inse | Céim latch | Raon Méid | Casmhóiminte Rátáilte kN·m |
|
| isteach | mm | ||||
| 1# | Ⅰ | 1 | 4~5-1/2 | 101.6 ~ 139.7 | 135 |
| 2 | 5-1/2~5-3/4 | 139.7~ 146 | |||
| Ⅱ | 1 | 5-1/2~ 6-5/8 | 139.7~ 168.3 | ||
| 2 | 6-1/2~7-1/4 | 165.1 agus 184.2 | |||
| Ⅲ | 1 | 6-5/8~7-5/8 | 168.3 ~ 193.7 | ||
| 2 | 7-3/4~8-1/2 | 196.9 ~ 215.9 | |||
| 2# | Ⅰ | 1 | 8-1/2~9 | 215.9~ 228.6 | |
| Ⅱ | 2 | 9-1/2~ 10-3/4 | 241.3 agus 273 | ||
| 2 | 10-3/4~ 12 | 273 × 304.8 | |||
| 3# | Ⅰ | 1 | 12~ 12-3/4 | 304.8 agus 323.8 | 100 |
| Ⅱ | 1 | 13-3/8~14 | 339.7~ 355.6 | ||
| 2 | 15 | 381 | |||
| 4# | Ⅱ | 1 | 15-3/4 | 400 | 135 |
| 5# | Ⅱ | 1 | 16 | 406.4 | 80 |
| 2 | 17 | 431.8 | |||