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 Air Force 
Dept. of the Navy Classification: Parts, nesoi, for roller bearings or for combined ball/roller bearings, nesoi
NSN 6105-01-395-6658
NSN 7035-01-442-6870
NSN 5960-01-215-9232
NSN 7035-01-587-9360
NSN 5975-01-102-0395
NSN 5895-01-430-7181
NSN 5998-00-008-4073
NSN 4140-00-401-7851
NSN 5930-01-490-6909
NSN 5990-01-485-0260
NSN 5925-01-186-6344
NSN 5965-00-422-5415