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 5998-00-499-0174
NSN 6320-01-504-3948
NSN 5855-01-634-0259
NSN 6610-01-408-7827
NSN 5998-00-754-5186
NSN 6650-01-051-4972
NSN 5960-00-044-1883
NSN 4140-00-116-1022
NSN 5975-00-435-5929
NSN 5915-01-433-9666
NSN 6220-01-523-4544
NSN 5960-01-424-1781