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 5950-01-168-8782
NSN 6650-01-556-6941
NSN 5905-00-141-0593
NSN 5990-01-442-3520
NSN 6320-00-139-1090
NSN 6130-01-021-3078
NSN 6620-01-231-2078
NSN 6685-01-123-9275
NSN 5965-01-326-9860
NSN 6685-01-323-2136
NSN 6685-00-203-4485
NSN 6145-01-568-5428