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 6135-01-027-7543
NSN 5915-01-599-8846
NSN 5905-01-012-3035
NSN 5965-01-012-1065
NSN 6645-01-449-1824
NSN 5920-01-587-1458
NSN 6645-01-152-1092
NSN 5935-01-100-0222
NSN 5910-01-642-9741
NSN 6150-00-122-4554
NSN 7035-01-107-2811
NSN 6320-01-512-2031