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 Navy 
Spain Classification: Parts, nesoi, for roller bearings or for combined ball/roller bearings, nesoi
NSN 5960-00-104-5955
NSN 5990-01-089-9694
NSN 5855-01-141-8227
NSN 5985-01-623-5361
NSN 6240-01-121-0469
NSN 5999-00-553-9831
NSN 5996-01-595-2435
NSN 6240-00-734-3276
NSN 6650-00-518-5194
NSN 6685-01-506-6698
NSN 2925-00-862-8550
NSN 6240-00-092-3186