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 6685-00-498-3540
NSN 5920-00-962-3567
NSN 6685-01-437-8880
NSN 5950-00-192-4653
NSN 4140-01-072-2289
NSN 6105-01-369-9699
NSN 5996-01-023-0537
NSN 6320-01-093-5738
NSN 6645-01-122-9430
NSN 6650-01-391-4461
NSN 5960-00-133-2475
NSN 5915-01-499-9424