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 6135-01-171-9299
NSN 6240-00-976-4435
NSN 5990-00-777-0413
NSN 5975-00-924-1461
NSN 5999-01-534-1982
NSN 6620-01-513-9674
NSN 5945-01-049-5413
NSN 6645-01-424-2891
NSN 6150-00-233-9459
NSN 5910-01-336-3222
NSN 5930-01-274-5119
NSN 6685-00-081-2816