Sprocket For Bushing Size SH For Bushing Type Quick Detachable For Chain Pitch 1/2 in Material Steel Number of Teeth 20 Outside Diameter 3.46 in Pitch Diameter 3.196 in Chain Number 40 For Number of Strands Single Maximum Bore Diameter 1 5/8 in Finish Black Oxide For Pitch Type Single Pitch Hub Diameter 2 11/16 in Hub Projection 0.529 in Hub Type One Side Length through Bore 13/16 in Material Grade 1045 Minimum Bore Diameter 1 11/16 in Resistance Properties Corrosion Resistant