... 2.pitch:31.750mm 3.plate thickness:4.00mm A series 100 chain used for Industry 1.material:40MN/A32.pitch ... thickness/mmU.T.S/KNA.T.S/KNWeight(/m)/KGWorking Load/KN20A-1R100-1R31.7519.0518.909.5340.4044.7030.004 ... -Ring Motorcycle chains: 428SO,520SO,525SO,530SO3. Roller chains: A series and B series4. Silent chains: SC3,SC4,SC5,SC6,SC8 ...