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 5950-01-634-0677
NSN 5855-01-534-7940
NSN 6650-01-583-8302
NSN 6650-01-414-4946
NSN 5998-00-187-0395
NSN 7035-00-703-3535
NSN 5895-01-497-9242
NSN 6610-01-568-7611
NSN 5996-01-450-6408
NSN 6645-00-011-9968
NSN 5950-00-265-5662
NSN 6150-01-215-0311