5905-00-851-8866 RESISTOR,FIXED,WIRE WOUND,INDUCT Index 1680-00-851-8872 SUPPORT,BEARING,JAC

National Stock Number:
3120-00-851-8871

Federal Supply Class:
3120

National Item Identification Number:
008518871

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:
6435-20233-10178286SIKORSKY AIRCRAFT CORPORATION


Techincal Specification:
CENTER HOLE KEYWAY QUANTITY4
CENTER HOLE KEYWAY RADIUS0.2400 INCHES MINIMUM AND 0.2600 INCHES MAXIMUM
CENTER HOLE SHAPE STYLEROUND W/ROUND KEYWAYS
CORNER SHAPESQUARE ALL CORNERS
CROSS-SECTIONAL SHAPE STYLERECTANGULAR
LUBRICATION FEATUREGROOVE FLAT BEARING SURFACE
MAJOR DIAMETER2.7070 INCHES MINIMUM AND 2.7320 INCHES MAXIMUM
OUTSIDE DIAMETER3.5650 INCHES MINIMUM AND 3.5850 INCHES MAXIMUM
OVERALL THICKNESS0.1020 INCHES MINIMUM AND 0.1040 INCHES MAXIMUM
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 4520 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALCOPPER ALLOY OVERALL
MINOR DIAMETER2.5930 INCHES MINIMUM AND 2.5980 INCHES MAXIMUM
SPECIAL FEATURES8 OIL GROOVES 4 ON EA SIDE EQUALLY SPACED DIAMETRICALLY OPPOSED
STYLE DESIGNATORROUND
SURFACE FINISH35.0 MICROINCHES LEFT SIDE
SURFACE FINISH35.0 MICROINCHES RIGHT SIDE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION6435-20233-101,78286 MFR REF SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTTIN OVERALL


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