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 5915-01-177-1766
NSN 6620-01-386-5543
NSN 6645-01-469-0192
NSN 6620-01-301-3258
NSN 6320-01-449-1014
NSN 5985-01-450-2186
NSN 5930-00-925-8246
NSN 4140-01-272-6929
NSN 5915-01-464-4926
NSN 6220-01-610-4662
NSN 5990-00-170-4239
NSN 5999-00-159-6039