660 Studs, uas tsis yog-sib nqus nyob rau hauv annealed mob, tab sis tej zaum yuav ua me ntsis sib nqus los ntawm vuam. Txawm hais tias nws muaj tib lub zog thiab corrosion kuj zoo li lwm cov hlau, ASTM A453 Gr. 660 Hex Lub Taub Hau Bolts tsim muaj zog welds vim lawv cov ntsiab lus carbon tsawg. ASTM A453 Qib 660 Studs yog tsim rau kev siv kub. Qib ntawm fasteners no tau muab faib ua qib A, B, C, D. Cov ntaub ntawv yog carbon, manganese, phosphorus, sulfur, silicon, nickel, chromium, molybdenum, titanium, aluminium, vanadium, boron. ASTM A453 Qib 660 Bolts muab lawv lub zog thiab kev tiv thaiv corrosion los ntawm kev sib xyaw ntawm cov ntaub ntawv.