Roller Chain Sprocket; 24B-1 Chain; 21 Teeth; 1 Row of Teeth; Hardened Teeth; 275.666MM Outside Diameter; 255.63MM Pitch Diameter; B-Hub One Side; Bushed Mount; 3020 Bushing; 38.1MM Chain Pitch; ISO Roller Chain; Keyway; Steel Material

Roller Chain Sprocket; 12B-3 Chain; 21 Teeth; 3 Row of Teeth; Hardened Teeth; 137.82MM Outside Diameter; 127.82MM Pitch Diameter; B-Hub One Side; Rough Bore Mount; No Bushing; 19.05MM Chain Pitch; ISO Roller Chain; No Keyway; Steel Material

Roller Chain Sprocket; 16B-2 Chain; 21 Teeth; 2 Row of Teeth; Hardened Teeth; 183.769MM Outside Diameter; 170.42MM Pitch Diameter; B-Hub One Side; Rough Bore Mount; No Bushing; 25.4MM Chain Pitch; ISO Roller Chain; No Keyway; Steel Material

Roller Chain Sprocket; 12B-2 Chain; 21 Teeth; 2 Row of Teeth; Hardened Teeth; 137.82MM Outside Diameter; 127.82MM Pitch Diameter; B-Hub One Side; Bushed Mount; 2517 Bushing; 19.05MM Chain Pitch; ISO Roller Chain; Keyway; Steel Material

Roller Chain Sprocket; 200 Chain; 21 Teeth; 1 Row of Teeth; Hardened Teeth; 18.088" Outside Diameter; 16.775" Pitch Diameter; B-Hub One Side; Rough Bore Mount; No Bushing; 2-1/2" Chain Pitch; ANSI Roller Chain; No Keyway; Steel Material