660 maTrud, isiri-yemagineti mune yakashamisika mamiriro, asi inogona kuve yakaderera mashiripiti nekubuda. Kunyangwe iyo ine imwechete yakakwirira simba uye kurwisa kwezvinhu sedzimwe midzi, astm a453 gr. 660 Hex Musoro Bolts inogadzira yakasimba maLDS nekuda kweiyo yakadzika kabhoni zvemukati. ASTM A453 Giredhi 660 maRds akakodzera kune tembiricha ekushandisa. Iyi giredhi rezvimisikidzwa rakakamurwa muA, B, C, D mamakisi. Zvigadzirwa zviri kabhoni, Manganese, Fossphorus, Sarufa, Nicful, Chromic, Molybdenum, Titanium, Aluminium, Vanadium, Boron. ASTM a453 Giredhi 660 mabhebhi anowana simba ravo uye kupesana nekusaita kubva mukubatanidzwa kwezvinhu.