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 5835-01-589-4735
NSN 2925-01-197-7864
NSN 4140-01-283-6699
NSN 7035-01-508-5954
NSN 6105-01-622-7281
NSN 6320-01-308-9392
NSN 6110-01-158-6138
NSN 6150-01-415-5148
NSN 6220-01-359-3009
NSN 5915-00-987-1855
NSN 5999-01-202-8707
NSN 5945-00-722-1824