Quick Detachable Bushing Bushing Type Quick Detachable Bore Bushing Series SD Bore Diameter 1 1/4 in Length 1.813 in Bolt Circle Diameter 2.6875 in Bolt Size 1/4 In.-20 x 1-7/8 in System of Measurement Standard Includes Cap Screws Material Iron Steel SAE Grade 5 Taper 3/4 in per ft On Diameter