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National Stock Number:
3120-00-989-0028
Federal Supply Class:
3120
National Item Identification Number:
009890028
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:
| 6435-20089-100 | 78286 | SIKORSKY AIRCRAFT CORPORATION |
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Techincal Specification:
| BEARING SURFACE HOLE DIAMETER | 0.1285 INCHES NOMINAL FIRST | | BEARING SURFACE HOLE QUANTITY | 18 FIRST | | CENTER HOLE SHAPE STYLE | ROUND | | CORNER SHAPE | CHAMFERED SECOND OUTSIDE CORNER | | CORNER SHAPE | CHAMFERED FIRST OUTSIDE CORNER | | CORNER SHAPE | SQUARE FIRST INSIDE CORNER | | CORNER SHAPE | SQUARE SECOND INSIDE CORNER | | COUNTERBORE DEPTH | 0.0910 INCHES NOMINAL | | COUNTERBORE DIAMETER | 19.3750 INCHES NOMINAL | | CROSS-SECTIONAL SHAPE STYLE | COUNTERBORED | | DIAMETER | 18.5620 INCHES NOMINAL | | OUTSIDE DIAMETER | 20.2500 INCHES NOMINAL | | OVERALL THICKNESS | 0.2460 INCHES MINIMUM AND 0.2480 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | 6435-20089-100,78286 AGHE MFR REF SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | COPPER ALLOY OVERALL | | MATERIAL | OIL LUBRICATING LUBRICATION | | STYLE DESIGNATOR | ROUND | | SURFACE CONDITION | GROUND | | SURFACE FINISH | 100.0 MICROINCHES OVERALL |
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