roller chain,roller chain,roller chain,roller chain,roller chain,roller chain,roller chain,roller chain,roller chain ANSI 80 /DIN 16A-1 standard roller chain 1.material:40MN/ ... plate thickness:3.25mmANSI 80 /DIN 16A-1 standard roller chain 1.material:40MN/A32.pitch:25.4mm3.plate ... ,40NP,50NP10. Coupling chains The Chain technic treatment is as below:1.Shot peening2.Bluing3.Phosphating4.Nickel-plated5 ...