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 4140-01-296-3365
NSN 5998-00-959-2283
NSN 6105-01-231-9823
NSN 5855-00-145-3307
NSN 5855-00-896-4047
NSN 5895-00-760-8296
NSN 5965-01-056-7225
NSN 5925-00-080-9284
NSN 5996-00-239-7914
NSN 6645-01-066-1679
NSN 6105-01-274-5951
NSN 6220-01-223-6206