Bushed Roller Chain 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 Hub Diameter 2 1/4 in Hub Projection 0.666 in Hub Type One Side Length through Bore 1 1/8 in Standards ANSI B29.1 BIS Teeth Heat Treatment Hardened Teeth Tooth Width 0.459 in