Johnson Duramax 870904139 Naval Brass cutless bearings adapt equally well to strut and sterntube mounts and are often used efficiently as rudder stock and pintle bushings. Johnson Duramax 870904139 Naval Brass cutless bearings use a specially forumlated oil and chemical resistant nitrile rubber that is bonded to the shell. Johnson Duramax Marine is the world’s largest supplier of marine bearings and each is made in the USA. Order your 870904139 Bearing today. The measurements for the 870904139 cutlass bearing are Shaft Size: 90 mm Outside Diameter: 4-1/2 inch Length: 14 inch