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 5930-01-530-0803
NSN 6650-00-051-1395
NSN 6610-00-186-9180
NSN 5835-01-528-7454
NSN 5945-01-501-4213
NSN 6645-00-967-8401
NSN 5915-01-208-9179
NSN 5910-01-094-9266
NSN 6105-01-256-3359
NSN 6645-01-043-5236
NSN 6645-00-664-4665
NSN 6645-00-163-9580