A series 50 short pitch industrial roller chain 1.material:40MN/A3 2.pitch:12. ... thickness:1.5-9.5mm A series 50 short pitch industrial roller chain 1.material:40MN/A32.pitch range:1270-76 ... 520, 520H, 530, 530H, 05MA, 05MB, 05MC, 06MC 2. O-Ring Motorcycle chains: 428SO,520SO,525SO,530SO3. Roller chains: A series ... . PIV chains: A0,A1,A3,A4,A5,A66. O-ring chains and xw-chains: 420,428,520,525,530,630 ...