... /A3 2.pitch:31.750mm 3.plate thickness:4.00mm A series 100 chain used for Industry 1. ... material:40MN/A32.pitch:31.750mm3.plate thickness range: ... no.Pitch/mmroller diameter/mmwidth between inner plate /mmPin diameter/mmPin length(L)/mmPin length (Lc ... chains: 428SO,520SO,525SO,530SO3. Roller chains: A series and B series4. Silent chains: SC3,SC4,SC5,SC6 ...