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 5935-01-290-1911
NSN 6150-01-173-5949
NSN 5835-01-390-0880
NSN 6645-01-501-0576
NSN 5999-01-448-1584
NSN 5915-00-451-7491
NSN 4140-01-383-1605
NSN 5985-01-585-1678
NSN 4140-00-710-3402
NSN 7035-01-570-1095
NSN 6645-01-463-4314
NSN 5999-01-498-1225