ANSI 60 A series simplex roller chains(12A-1R) 1)material : 40mn 2)pitch : 19.050mm 3)plate thickness : 2.42mm ANSI 60 A series simplex roller chains ... (12A-1R)1)material : 40mn2)pitch : 19.050mm3)plate thickness : 2.42mm4 ... ,420,428,428H,520,530,630,25,25H3)short pitch conveyor roller chain attachments:A-1,A-2.K-1,K-2,SA-1,SA-2 ...