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 5985-01-039-2317
NSN 6320-01-378-6191
NSN 6685-01-626-4601
NSN 2925-01-528-7333
NSN 5985-01-319-0282
NSN 6150-00-280-4500
NSN 5960-01-323-6432
NSN 6150-00-501-8077
NSN 5975-00-494-3244
NSN 5925-01-028-6504
NSN 5935-00-385-3635
NSN 6105-01-493-5532