Martin R1 1 15/16 Standard MST Bushing, 1-15/16 in Dia Bore, 3-7/8 in Small End/4 in Large End Dia Barrel, 5-3/8 in Dia Flange, 2.88 in OAL, Ductile Iron

Martin MST Bushing, Standard, 1-15/16 in Bore Dia, 3-7/8 in Small End/4 in Large End Barrel Dia, 5-3/4 in Hub Dia, 4-5/8 in Bolt Circle, 5-3/8 in Flange Dia, 0.62 in Flange Thickness, 3 Bolt Holes, 3/8-16 x 1-3/4 in (Cap Screw)/5/16-18 x 5/16 in (Set Screw) Screw, For Use With: MST® Sprockets and HR1 Weld-On Hub, 2.88 in Overall Length, 1/2 x 1/4 in Keyway, Ductile Iron