Sprocket, Industry Chain Size 35, Industry Chain Pitch 3/8 in, Number of Teeth - Sprockets 25, Fixed Bore, Bore Dia. - Sprockets 3/4 in, Outside Dia. 3.189 in, Single Number of Chain Rows, Material - Sprockets Steel, Pitch Dia. 0.375 in, Type B, Length through Bore 0.875 in, Hub Dia. 2 in, Set Screw Hole Dia. 0.25 in, Keyway Size 3/16 in x 3/32 in, Setscrew Location One Setscrew Over The Keyway and A Second Setscrew At 90 Degrees , For Use With Roller Chain