H 1-5/16" inch Split-Taper Bushings ID: 1.3125" ( H or QT QD Series ) H 1-5/16" Bore Bushing Flange outside diameter: 2-1/2" Flange thickness: 1/4" inch Length through bore: 1-1/4" Material : Cast Iron Bore type: Keyway Keyway size: 5/16" X 3/16" Bolt Diameter :1/4" One Bushing Split taper bushings mount sheaves and sprockets on shafts and are built to withstand torque generated in power transmission The double split steel, flanged design makes these bushings more adjustable in regards to shaft size and improves hold strength. The bushing also includes a keyway to help lock it in place on the shaft.