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 5910-01-118-8362
NSN 5915-01-524-6995
NSN 6130-01-065-3723
NSN 5975-01-455-8315
NSN 7035-00-553-6951
NSN 6220-00-244-2040
NSN 5920-01-084-5118
NSN 5996-01-595-2094
NSN 5965-00-791-0964
NSN 5925-01-421-1139
NSN 5835-01-076-8445
NSN 5965-01-647-4195