Astm A453 Fassarar kayan abu ne don studs, kututture, kwayoyi da sauran masu zagaye, waɗanda aka yi niyya don amfani a aikace-aikacen zazzabi bolting. Astm A453 Dig 660 an rarrabe shi cikin aji na dukiya guda 4 wato A, B, C & D, kowannensu ya tsara tare da abubuwan da ke tattare da damuwa. Sa 660 Ana amfani da wuraren shakatawa a cikin bolting na bolting, tasoshin matsin lamba, bututun bututun bututun bututun ruwa, ana nufin hidimar zazzabi mai yawa. Astm A453 ST 660 abu ne mai ilmin kimiya na kimiyyar ASTM B638 sa 660 Bakin karfe na S66286, an san shi da esoy karfe da aka ayyana a cikin ASM A4m A453.