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 Air Force 
Dept. of the Navy Classification: Parts, nesoi, for roller bearings or for combined ball/roller bearings, nesoi
NSN 5910-01-124-4280
NSN 6650-01-148-5307
NSN 5935-00-555-2633
NSN 5925-00-422-3580
NSN 5905-00-272-9259
NSN 5835-00-155-1379
NSN 5996-00-161-4202
NSN 6110-01-519-3813
NSN 6650-01-372-6013
NSN 4140-01-065-0314
NSN 6220-00-898-7311
NSN 6240-00-079-0112