Izikopelo ezingama-660, ezingezona amabuthe esimweni esiveziwe, kepha zingaba ngumagrezi omncane ngokufudumala. Yize inamandla aphezulu afanayo nokuphikiswa kokugqwala njengamanye ama-steel, i-ASTM A453 GR. I-660 hex head bolts ikhiqiza ama-welds anamandla ngenxa yokuqukethwe kwabo okuphansi kwekhabhoni. Izikopelo ze-ASTM A453 Ibanga le-660 zilungele izinhlelo zokushisa. Leli banga le-fasteners lihlukaniswe ngama-a, b, c, d amamaki. Izinto zokwakha yikhabhoni, i-manganese, phosphorus, isibabule, i-silico, i-nickel, chromium, i-aluminium, i-aluminium, i-aluminium, i-aluminium, i-aluminium, i-aluminium, i-aluminium, i-aluminium, i-aluminium, i-aluminium, i-aluminium, i-boron. I-ASTM A453 Ibanga le-660 Bolts lithola amandla abo nokuphikiswa kokugqwala kusuka kwinhlanganisela yezinto zokwakha.