An item of any peripheral shape usually having one flat or spherical surface and a centrally located hole. It is designed for applications involving moving (kinetic) loads. Except for items fabricated from bearing quality synthetic (plastic) or composed of multilayer material, one bearing surface must either have a specific surface finish designation of 32 microinch (0.8 micrometre) or less, arithmetical average (aa) (arithmetic mean deviation) or one of the following conditions: be lapped or ground; have visible or detectable means of lubrication; grooves, indentations; or self-lubrication. The thickness must not exceed 25 percent of the outside diameter of the shortest distance between peripheral flats (when thickness and/or outside diameter is designated as a tolerance dimension, the maximum dimension will be used to determine compliance). Excludes straight, tubular (without flange) items having a bearing surface(s) parallel to the axis of the bore only. See also washer, flat and spacer, sleeve.
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Australia 
Germany Classification: Thrust ball bearings
NSN 5930-00-414-3296
NSN 6645-01-607-4078
NSN 5915-01-620-3754
NSN 6650-01-024-9554
NSN 6620-00-522-6693
NSN 5999-01-624-2802
NSN 5999-00-226-0109
NSN 6130-01-434-7424
NSN 5930-01-513-8813
NSN 5998-01-489-5301
NSN 5855-01-441-3189
NSN 5905-00-461-9694