... chain,roller chain,roller chain,roller chain,roller chain ANSI 80 /DIN 16A-1 standard roller chain 1.material:40MN/A3 ... 2.pitch:25.4mm 3.plate thickness:3.25mmANSI 80 /DIN 16A-1 standard roller chain 1.material:40MN/A32 ... -plated5.Zincing6.Heat treatment7.Carburizing8.Quenching9.Tempering10.Oiling11.Greasing ANSI 80 /DIN 16A-1 standard roller chain