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 5930-00-950-9360
NSN 2925-00-816-8765
NSN 6320-01-088-1109
NSN 6685-00-229-3224
NSN 6145-00-970-1549
NSN 5915-00-879-0458
NSN 5990-01-193-0487
NSN 5930-01-144-2088
NSN 5915-01-525-7731
NSN 7035-00-946-2642
NSN 5999-01-109-1877
NSN 6685-00-036-0972