A single or multiple piece item without ball, plain or roller bearing(s). It is designed to meet various or specific conditions of mounting. For items with bearings, see bearing unit, ball; bearing unit, plain; and bearing unit, roller.
2.580 inches nominal housing length, 5.200 inches nominal housing diameter, 3.1800 inches nominal bore diameter, for main battle tank,m1 end item identification, 2.920 inches nominal assembly overall length