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.
NSN 6320-00-590-9342
NSN 6645-01-099-6887
NSN 6135-00-927-5848
NSN 5920-01-004-4107
NSN 5925-01-521-0242
NSN 5985-01-351-5671
NSN 5910-01-538-3075
NSN 5935-01-024-8512
NSN 5835-00-841-2650
NSN 6110-01-470-5057
NSN 5985-01-295-7711
NSN 5920-01-421-0291