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 Air Force Classification: Thrust ball bearings
NSN 5905-01-578-8019
NSN 5998-01-634-0604
NSN 4140-01-173-7869
NSN 6685-01-053-2551
NSN 5950-01-178-4109
NSN 5960-00-372-4876
NSN 5835-01-061-4284
NSN 5965-01-076-8026
NSN 5855-01-581-9697
NSN 6240-01-470-9322
NSN 5990-00-174-6695
NSN 6650-01-021-1237