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National Stock Number:
3120-00-741-0026
Federal Supply Class:
3120
National Item Identification Number:
007410026
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:
| 6764962 | 24617 | GENERAL MOTORS CORP | | 6764962 | 73342 | ALLISON TRANSMISSION INC | | 7410026 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CORNER SHAPE | SQUARE ALL CORNERS | | CRITICALITY CODE JUSTIFICATION | FEAT | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | DIAMETER | 2.7580 INCHES MINIMUM AND 2.7680 INCHES MAXIMUM | | FEATURES PROVIDED | CASEHARDENED | | HARDNESS RATING | 60.0 ROCKWELL C NOMINAL OVERALL | | OUTSIDE DIAMETER | 3.2500 INCHES NOMINAL | | OVERALL THICKNESS | 0.4350 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM | | MATERIAL | STEEL COMP 1117 OVERALL | | SPECIAL FEATURES | BEARING SURFACES MUST BE GROUND PARALLEL WITHIN 0.0010 | | STYLE DESIGNATOR | ROUND | | SURFACE CONDITION | GROUND |
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