13 splines equally spaced inside dia
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 4140-01-417-7552
NSN 5945-01-092-3651
NSN 5996-00-005-4257
NSN 6220-01-412-1487
NSN 5920-01-267-6086
NSN 5985-00-463-5284
NSN 6220-01-226-1776
NSN 5950-00-248-6921
NSN 7035-01-131-1168
NSN 5935-00-288-5973
NSN 5965-01-040-4178
NSN 5925-01-072-3867