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 6240-00-172-8451
NSN 5915-00-739-1281
NSN 5895-01-029-3791
NSN 6130-00-525-3246
NSN 7035-01-026-0117
NSN 6150-00-903-5049
NSN 5910-01-276-1127
NSN 5996-01-513-0774
NSN 6240-00-827-0889
NSN 5996-01-491-0178
NSN 5910-01-304-4658
NSN 6645-01-400-2119