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 4140-01-555-8190
NSN 6220-01-625-6475
NSN 6650-00-070-5952
NSN 6110-01-046-0120
NSN 5930-01-434-1292
NSN 5950-00-383-2826
NSN 5910-01-610-2912
NSN 5945-01-193-4277
NSN 5960-01-512-0233
NSN 5975-00-800-0287
NSN 5998-01-245-5383
NSN 6620-01-487-2509