A cylindrical item in which the inner or outer ring turns upon row(s) of hardened ball, bearing which roll on a raceway, thus minimizing friction. These items are characterized by their noncorrosive qualities, lightness of weight, inch dimensions rather than metric, inner rings generally projecting beyond the faces of the outer ring, or a very narrow width inner ring having an outside diameter slightly larger than the bore diameter. Designed primarily for use in aircraft assemblies, such as control systems and surfaces of aircraft. Excludes:bearing,ball,annular.
ams 6440 fed spec single material response and ams 3652 fed spec 2nd material response overall material document and classification, 0.9950 inches minimum and 1.0005 inches maximum bore diameter, 0.4370 inches nominal inner ring width, 1.7500 inches nominal overall outside diameter, fwd,fuselage 1 ;eagle-f15,acft end item identification