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 5990-01-419-0661
NSN 5960-01-412-9474
NSN 5935-00-617-8406
NSN 6150-00-526-3720
NSN 5985-00-909-3902
NSN 6220-00-079-0178
NSN 6135-01-277-7907
NSN 5999-01-631-6236
NSN 5920-00-317-2219
NSN 6645-00-067-7070
NSN 5915-01-388-8339
NSN 5930-01-399-8713