Isikulufu
Ama-thread studs avame ukwakhiwa ngezinto ezihlukene zekhwalithi ephezulu, ezikhethwa ngokusekelwe ezidingweni ezithile zezinhlelo zokusebenza ezahlukene mayelana namandla, ukuqina, nokumelana nokugqwala. I-Carbon steel ime njengenye yezinto ezivame kakhulu, ikakhulukazi emabangeni afana no-4.8, 8.8, no-10.9.