Sprocket, For Bushing Size H1, For Bushing Type Split Taper, For Chain Pitch 5/8 in, Material Steel, Number of Teeth 18, Outside Diameter 3.92 in, Pitch Diameter 3.599 in, Chain Number 50, For Number of Strands Single, Finish Black Oxide, Hub Diameter 2 1/2 in, Hub Projection 0.532 in, Hub Type One Side, Length through Bore 7/8 in, Material Grade 1045, Resistance Properties , Teeth Heat Treatment Hardened Teeth, Tooth Width 0.343 in, Width with Bushing 1.969 in