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 5945-01-608-4853
NSN 5920-01-259-4258
NSN 5990-01-463-2279
NSN 5996-00-823-9164
NSN 5960-01-161-8636
NSN 6645-01-531-7497
NSN 6105-00-917-6509
NSN 6110-00-938-6893
NSN 5985-01-411-8658
NSN 6130-00-501-7696
NSN 5975-00-079-0022
NSN 5999-01-410-2867