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 5930-01-440-9862
NSN 5925-01-250-2514
NSN 5925-01-236-6722
NSN 5999-01-526-7807
NSN 6650-00-267-0390
NSN 5925-01-085-1216
NSN 5999-01-316-8554
NSN 6610-01-376-7456
NSN 5925-00-992-4963
NSN 5835-00-823-6116
NSN 5935-00-169-9688
NSN 5960-01-412-0619