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 5999-01-570-1273
NSN 6650-00-356-8405
NSN 5999-01-141-0616
NSN 5920-01-457-0189
NSN 5925-00-103-7444
NSN 5960-00-661-0477
NSN 5998-01-469-6119
NSN 6135-00-593-6831
NSN 5915-00-226-6863
NSN 5855-00-079-2370
NSN 5998-00-248-7472
NSN 5835-01-440-5391