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.
Classification: Thrust ball bearings
NSN 4140-01-483-1993
NSN 6645-01-204-4653
NSN 6150-00-812-8145
NSN 5905-01-264-0493
NSN 2925-01-533-7904
NSN 5925-00-900-5354
NSN 5835-00-830-6416
NSN 5905-01-453-4607
NSN 5930-01-219-0025
NSN 4140-01-100-7922
NSN 5998-01-255-4270
NSN 5996-01-017-1309