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: Parts of armored fighting vehicles,motorized, whether or not fitted with weapons
NSN 6620-01-158-5111
NSN 2925-00-295-8109
NSN 6650-00-950-4107
NSN 6620-00-459-1622
NSN 5835-01-123-8305
NSN 6150-00-233-6356
NSN 2925-00-555-8836
NSN 6650-00-078-5773
NSN 6620-01-346-9340
NSN 6650-01-554-2824
NSN 5920-01-406-3157
NSN 5925-01-392-0881