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 5925-00-529-3950
NSN 4140-00-508-3206
NSN 6220-01-027-4223
NSN 6320-00-313-9114
NSN 5998-01-383-9758
NSN 5905-01-400-5968
NSN 5960-00-801-8297
NSN 6135-01-167-7604
NSN 5975-01-109-0511
NSN 6620-01-440-3523
NSN 5985-00-100-4310
NSN 6320-00-790-4844