Quick Detachable Bushing, Bushing Type Quick Detachable, Bore Bushing Series SK, Bore Diameter 55 mm, Length 1.875 in, Bolt Circle Diameter 3.31 in, Bolt Size 5/16 In.-18 x 2 in, System of Measurement Metric, Bushing Diameter 2.813 in, Flange Type Split, Flange Width 1/2 in, For Shaft Type Keyed, Includes (3) Cap Screws, Keyway Height 4.5 mm, Keyway Width 16 mm, Length Less Flange 1.375 in, Material Steel, Overall Diameter 3.875 in, SAE Grade 5, Taper 3/4 in Per ft