IDC Select® offers a wide range of high quality roller chain sprockets produced in ISO certified facilities to ANSI standards. Plain bore, finished bore, taper and QD® bushing designs are available. All IDC Select® sprockets come with hardened teeth and black oxide finish for long lasting service life. The finished bore design comes complete with a keyway on the centerline of the sprocket tooth and two setscrews, one over the keyway and one at 90 deg. IDC Select® Single Strand Roller Chain Sprocket, Finished Bore Type B, 1-1/2 in Bore Dia, 3.74 in Outside Dia, 60 Chain, 14 Teeth, 3/4 in Pitch, 3.371 in, 3/8 in Screw, 3/8 in W x 3/16 in D Keyway, 1-1/4 in Length Through Bore, C1045 Steel, Black Oxide