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 5905-00-679-9970
NSN 5835-01-426-6573
NSN 5950-01-239-2319
NSN 6220-01-285-6084
NSN 5965-00-372-2537
NSN 6150-00-296-2361
NSN 6650-00-455-9457
NSN 5930-01-200-1763
NSN 5855-01-559-9639
NSN 4140-01-334-9043
NSN 2925-01-148-2023
NSN 5925-01-137-6161