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 Corrosion Resistant Teeth Heat Treatment Hardened Teeth Tooth Width 0.343 in Width with Bushing 1.969 in