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 6620-01-168-7705
NSN 6110-01-575-8471
NSN 5985-01-190-9001
NSN 6320-01-371-3047
NSN 5999-01-356-1294
NSN 6105-01-386-1529
NSN 6620-00-290-6505
NSN 5905-00-860-0647
NSN 6685-01-654-5797
NSN 6610-01-650-6364
NSN 5920-01-065-1824
NSN 6645-01-369-4371