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 5915-01-127-3110
NSN 2925-01-320-6512
NSN 6145-01-282-6180
NSN 6620-01-633-8443
NSN 5895-00-434-5721
NSN 5905-01-634-0595
NSN 5985-00-698-9571
NSN 5960-00-969-9242
NSN 5855-01-448-9794
NSN 5915-01-069-0453
NSN 6610-00-664-2190
NSN 6685-00-004-7030