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 5950-01-278-9057
NSN 5990-01-411-5930
NSN 5935-01-510-4434
NSN 5996-00-755-2078
NSN 5925-01-173-1764
NSN 5960-01-188-4558
NSN 5999-01-608-4318
NSN 5985-00-878-1470
NSN 5996-01-391-4746
NSN 5895-00-481-0739
NSN 6685-00-103-2854
NSN 5965-01-481-9672