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 5998-01-441-9315
NSN 5990-01-465-9235
NSN 6320-01-100-7554
NSN 6620-01-462-5196
NSN 5945-01-157-5691
NSN 5960-01-069-8028
NSN 5920-01-304-4034
NSN 5905-01-354-0879
NSN 2925-00-802-9387
NSN 6145-01-322-1380
NSN 5999-01-432-0133
NSN 6645-00-476-7176