AquaMarine Cutless Naval Brass Sleeve Bearings:- adapt equally well to strut and stern-tube mounts , and are often used effectively as rudder-stock and pintle bushings. Bearing diameters are precision fitted to the designated shaft size with the correct clearance for effective water lubrication. External brass shells are machined and polished to provide easy fitting. Specially formulated oil, chemical resistance, high in abrasion, high quality Nitrile rubber is securely bonded to shell. Units with thin shells are available for the struts of small craft. Sleeve Bearings are usually insulated by light press-fitting and locked in place with cone-pointed set screws.