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 | Céim latch | Raon Méid mm (isteach) |
Casmhóiminte Rátáilte(kN.m) |
| 5a | 1 | 86~ 105(3-3/8~4-1/8) | 55 |
| 2 | 105~ 133(4-1/8~5-1/4) | ||
| 5b | 1 | 108~ 133(4-1/4~5-1/4) | 75 |
| 2 | 127~ 146(5~5-1/4) | ||
| 3 | 152~ 171(6~ 6-3/4) | ||
| 5b~1 | 1 | 133~ 146(5~6) | 75 |
| 2 | 146~ 168(6~7) | ||
| 3 | 168~ 208(7~8) | ||
| 5c | 1 | 168~ 187(6-5/8~7-3/8) | 75 |
| 2 | 187~ 203(7-3/8~8) | 55 | |
| 3 | 216~ 219(8-1/2~8-5/8) | ||
| 5d | 1 | 216~ 244(8-1/2~9-5/8) | 55 |
| 2 | 270~ 273(10-5/8~10-3/4) | ||
| 5e | 1 | 298(11-3/4) | 55 |
| 2 | 324(12-3/4) | ||
| 5e1 | 1 | 273(10-3/4) | 55 |
| 2 | 298(11-3/4) | ||
| 5e3 | 1 | 330(13) | 55 |
| 340(13-3/8) |