3120-00-179-7255 BEARING,PLAIN,SELF-ALIGNING Index 5310-00-179-7257 WASHER,FLAT

National Stock Number:
3120-00-179-7256

Federal Supply Class:
3120

National Item Identification Number:
001797256

Description:
BEARING,WASHER,THRUST

Detail:
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.


Manufacturer Information:
25704-281530-17-0D1839BUNDESAMT FUER AUSRUESTUNG,
25704-281530-17-0D2692KRAUSS-MAFFEI WEGMANN GMBH & CO. KG-WERK KASSEL-
3120001797256A00AME.C.A ETABLISSEMENT CENTRAL DESAPPROVISIONNEMENTS DES FORCES ARMEE
3120001797256SCY13E.C.A ETABLISSEMENT CENTRALD'APPROVISIONNEMENT DES FORCES ARMEE
873485919207U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM
8734859D5589FEINMECHANISCHE WERKE MAINZ GMBH
8734859D9893LIEBHERR-AEROSPACE LINDENBERG GMBH


Techincal Specification:
MATERIALCOPPER ALLOY OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-B-5687,TY 1,COMP A MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
STYLE DESIGNATORROUND
OUTSIDE DIAMETER0.8750 INCHES NOMINAL
CORNER SHAPESQUARE ALL CORNERS
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
OVERALL THICKNESS0.1310 INCHES NOMINAL
CENTER HOLE SHAPE STYLEROUND
DIAMETER0.4400 INCHES MINIMUM AND
0.4450 INCHES MAXIMUM
LUBRICATION MATERIALLUBRICANT, MANUFACTURERS STANDARD
THE MANUFACTURERS DATA
MANUFACTURERS CODE19207
DESIGN CONTROL REFERENCE8734859


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