660 Studs, na-abụghị magnetic na ọnọdụ a na-anwale, mana ọ nwere ike ịcha ma ọlị. Ọ bụ ezie na o nwere otu ike na corrosion iguzogide dị ka steel ndị ọzọ, ASTM A453 GR. 660 hex isi bolts na-emepụta ihe ndị siri ike n'ihi ọdịnaya carbon dị ala. ASTM A453 Studs dị mma maka ngwa okpomọkụ. A na-ekewa ọkwa nke flateners a na A, b, c, d akara. Akụrụngwa bụ carbon, manganese, phosphorus, sọlfọ, silinium, titanium, alumium, boriadium, borianium, boriadium, borianium, borianium, borianium, borianium, borianium, boriadium. ASTM A453 Bolts na-enweta ike ha ike na corrosion iguzogide ihe.