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 5855-01-631-4331
NSN 5920-01-269-3047
NSN 5920-01-394-0636
NSN 6240-01-245-2291
NSN 5960-01-423-2511
NSN 5930-01-465-7672
NSN 5945-01-161-8171
NSN 6320-00-371-8335
NSN 6685-01-113-8985
NSN 6135-01-317-6021
NSN 5975-01-311-8704
NSN 5960-00-140-9583