Quick Detachable Bushing Bushing Type Quick Detachable Bore Bushing Series SK Bore Diameter 1 in Length 1.875 in Bolt Circle Diameter 3.31 in Bolt Size 5/16 In.-18 x 2 in System of Measurement Inch Bushing Diameter 2.813 in Flange Type Split Flange Width 1/2 in For Shaft Type Keyed Includes (3) Cap Screws Keyway Height 1/8 in Keyway Width 1/4 in Length Less Flange 1.375 in Material Steel Overall Diameter 3.875 in SAE Grade 5 Taper 3/4 in Per ft