Sprocket For Bushing Size JA For Bushing Type Quick Detachable For Chain Pitch 3/4 in Material Steel Number of Teeth 13 Outside Diameter 3.49 in Pitch Diameter 3.134 in Chain Number 60 For Number of Strands Single Maximum Bore Diameter 1 1/4 in Finish Black Oxide For Pitch Type Single Pitch Hub Diameter 2 1/16 in Hub Projection 0.166 in Hub Type One Side Length through Bore 9/16 in Material Grade 1045 Minimum Bore Diameter 1 1/4 in Resistance Properties Corrosion Resistant