Izikrufu ezilungisekayo zezimboni ezenziwe nge-chrome vanadium. Kudlula izindinganiso zamazwe ngamazwe ISO 6787-1982, ASME B.107.8M-1996, BS 6333-1995, DIN 3117-1988, JIS B4604-1976. Umhlathi we-15deg uvumela isikrufu ukuthi sisetshenziswe ezindaweni eziwumngcingo njengoba kudingeka ukujika okungu-30deg kuphela. Ukuvuleka komhlathi okubanzi kwandisa ububanzi bosayizi webhawodi okuzosetshenzwa kuwo. Ukungaphumeleli ekugcineni komhlathi onyakazayo kunikeza isenzo esingcono uma isikhala silinganiselwe. Isibambo sihlinzeka ngokulingana kwesandla okunethezekile. Ukuqeda i-phosphate.
| L (mm) |
L (intshi) |
Amandla (mm) | Amandla (af) | T (mm) | D (mm) | I-ISO Norm (Nm) | Isisindo (g) |
| 300 | 12 | 38 | 1 1/2" | 32 | 80 | 515 | 660 |