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 5930-01-044-2614
NSN 5920-00-519-7664
NSN 5910-01-361-9106
NSN 5975-00-927-3177
NSN 6105-01-604-8621
NSN 6610-01-552-2726
NSN 5905-00-419-3234
NSN 5998-00-585-3171
NSN 6645-01-063-3371
NSN 5855-00-491-7079
NSN 5990-01-502-8209
NSN 6130-01-171-2523