... 4.ISO9001:2008 Detailed Production DescriptionANSI 60 durable triplex roller chain(12-3R)1)material : 40mn/A32)pitch : 19.05mm3)plate ... :428,428H,530,530H,630,630H3)short pitch conveyor roller chain attachments:A-1,A-2.K-1,K-2,SA ... The chain technic is as bellow1)shot peening2)bluing3)phosphating4)nickel-plated5)zincing6)heat treatment7)greasing8)quenching9)tempering10)oilingIf you are interested in ...