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 5930-00-555-3007
NSN 6130-01-346-6678
NSN 5915-00-498-1988
NSN 5835-00-494-8419
NSN 6240-01-040-1321
NSN 7035-00-490-0485
NSN 5935-01-212-4273
NSN 6610-01-460-4864
NSN 7035-01-613-0610
NSN 6135-01-215-1245
NSN 5998-00-413-2594
NSN 6685-00-119-4406