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 6220-01-352-5425
NSN 6685-01-007-6123
NSN 5915-01-445-4107
NSN 6135-00-819-8074
NSN 6650-01-056-1777
NSN 5990-00-105-7831
NSN 5930-00-171-5087
NSN 6645-00-433-8729
NSN 5965-00-984-1393
NSN 6650-00-244-5648
NSN 5835-01-291-5405
NSN 6650-01-030-0238