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 5895-01-211-6241
NSN 5960-01-526-3843
NSN 6130-01-485-0193
NSN 6650-00-498-6336
NSN 5915-00-897-8217
NSN 6220-00-222-7426
NSN 6620-01-313-1259
NSN 5985-00-141-5971
NSN 5895-01-437-5966
NSN 5920-00-080-5827
NSN 6645-00-720-3953
NSN 6145-00-150-5049