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 6105-01-440-3153
NSN 2925-01-446-6976
NSN 5960-01-437-1315
NSN 4140-01-189-7899
NSN 5975-00-983-0111
NSN 5996-00-636-4849
NSN 5910-00-328-2174
NSN 5950-00-205-2932
NSN 6150-01-203-7411
NSN 6130-01-104-1308
NSN 5990-01-315-3754
NSN 5985-01-322-0304