A tubular shaped item with or without flange(s) designed to reduce friction and carry a kinetic load on the surface(s) parallel to the axis of the bore. it must have a visible or detectable means of lubrication or be self-lubricated. the over all length must exceed 25 percent of the outside diameter or the shortest distance between peripheral flats of the body, except for straight tubular (without flange or shoulder) items having a bearing surface(s) parallel to the axis of the bore only. includes items which are divided into two or more segments which include 180 degrees (3.141 radians) or less of the bearing periphery. see also bushing, sleeve; spacer, sleeve; and washer (as modified). excludes pin, hollow.
Dept. of the Navy 
Spain Classification: Parts, nesoi, for roller bearings or for combined ball/roller bearings, nesoi
NSN 5965-01-350-1890
NSN 6240-00-135-3385
NSN 5930-01-522-5072
NSN 5930-01-101-7679
NSN 5999-01-441-1834
NSN 5996-01-595-6111
NSN 5855-01-205-7030
NSN 5975-01-660-1686
NSN 6105-01-438-9750
NSN 5835-00-501-2581
NSN 6620-00-905-6590
NSN 6135-00-809-2148