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National Stock Number:
3120-01-109-1972
Federal Supply Class:
3120
National Item Identification Number:
011091972
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.
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Manufacturer Information:
| 11628351 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM | | 11628351 | 97993 | GENERAL DYNAMICS DEFENSE SYSTEMS INC. DBA GENERAL DYNAMICS ADVANCED INFORMATION SYSTEMS |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CORNER SHAPE | SQUARE ALL CORNERS | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | DIAMETER | 2.8210 INCHES NOMINAL | | OUTSIDE DIAMETER | 4.1300 INCHES NOMINAL | | OVERALL THICKNESS | 0.0970 INCHES NOMINAL | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-B-13506 MIL SPEC 1ST MATERIAL RESPONSE OVERALL | | MATERIAL | COPPER ALLOY 794 FLAT BEARING SURFACE | | MATERIAL | STEEL BODY | | SPECIAL FEATURES | 8 CUT GROOVES ON FLAT BEARING SURFACE,EQUALLY SPACED,180 DEGREE GROOVES,AT 45DEGREES AROUND DIA,0.018IN. DEPTH;BRONZE ALLOY DEPTH 0.010-0.020IN. | | STYLE DESIGNATOR | ROUND |
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