Last Modified: Apr 20, 2021

NSN 3120-01-336-3275 Bearing, Washer, Thrust

Item Name:	BEARING,WASHER,THRUST
Federal Supply Class (FSC):	3120
NIIN:	01-336-3275 (013363275)
Definition:	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.
NMF Description:	WASHER OR GASKETS, IRON OR STEEL,