Single Strand Sprocket Bore Diameter 5/8 in For Chain Pitch 3/8 in For Number of Strands Single Hub Type One Side Material Steel Maximum Bore Diameter 5/8 in Number of Teeth 18 Outside Diameter 2.35 in Pitch Diameter 2.16 in Bore Type Fixed Chain Number 35 Finish Black Oxide For Pitch Type Single Pitch Hub Diameter 1 3/4 in Hub Projection 0.582 in Includes Set Screws Keyway Yes Keyway Depth 3/32 in Keyway Width 3/16 in Length through Bore 3/4 in Material Grade 1045