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 5925-01-346-8598
NSN 5998-01-508-3854
NSN 6135-01-419-0779
NSN 6110-01-277-3724
NSN 5935-01-498-9230
NSN 5965-01-258-5662
NSN 5999-01-155-4661
NSN 5905-01-130-9669
NSN 5915-01-572-1126
NSN 6610-01-283-2341
NSN 5990-01-037-1704
NSN 6220-00-376-6533