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 5835-01-241-1090
NSN 2925-00-005-1618
NSN 5915-01-359-0285
NSN 5990-01-348-9829
NSN 6610-01-247-1798
NSN 6145-01-431-6834
NSN 5975-00-197-6515
NSN 5945-01-439-1683
NSN 6145-00-968-6590
NSN 6620-01-437-8193
NSN 5945-01-449-0288
NSN 5990-01-263-0362