... ISO9001:2008 Detailed Production DescriptionANSI 60 durable triplex roller chain(12-3R)1)material : 40mn/A32)pitch ... ,428H,530,530H,630,630H3)short pitch conveyor roller chain attachments:A-1,A-2.K-1,K ... SK-A,SK-24)double pitch transmissions v& conveyor chains :2040,2050,2060,20805)leaf chains:LH ... steel roller chains7)simplex,double,triplex chains The chain technic is as bellow1)shot peening2)bluing3) ...