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 6620-01-253-0374
NSN 6220-01-126-4839
NSN 5998-01-274-7665
NSN 2925-01-049-8906
NSN 6685-00-596-8765
NSN 6240-01-657-4133
NSN 5910-00-633-7743
NSN 5945-00-446-2867
NSN 5960-00-402-9390
NSN 6620-00-762-0349
NSN 6610-01-606-2144
NSN 4140-00-332-5956