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.
Dept. of the Navy Classification: Thrust ball bearings
NSN 5905-01-327-7418
NSN 7035-01-145-5059
NSN 5905-01-274-4038
NSN 6150-00-125-9572
NSN 4140-01-505-6545
NSN 5925-01-018-1375
NSN 5999-01-319-6295
NSN 5945-01-552-8758
NSN 6130-00-056-8126
NSN 5965-01-431-8147
NSN 5999-01-231-5868
NSN 7035-01-454-7722