Bushed Roller Chain Sprocket For Bushing Size JA For Bushing Type Quick Detachable For Chain Pitch 1/2 in Material Steel Number of Teeth 19 Outside Diameter 3.3 in Pitch Diameter 3.038 in Chain Number 40 For Number of Strands Single Maximum Bore Diameter 1 1/4 in Finish Black Oxide Hub Diameter 2 1/4 in Hub Projection 0.279 in Hub Type One Side Length through Bore 9/16 in Standards ANSI B29.1 BIS Teeth Heat Treatment Hardened Teeth Tooth Width 0.284 in