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 5996-00-173-2289
NSN 6320-00-456-0836
NSN 5895-01-432-5096
NSN 5985-00-830-4680
NSN 5945-01-124-9632
NSN 6130-00-594-3981
NSN 5998-01-063-7803
NSN 6220-01-172-1277
NSN 6220-01-554-1628
NSN 5999-01-065-8543
NSN 6620-01-370-6829
NSN 5990-01-334-3268