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National Stock Number:
3120-00-255-5708
Federal Supply Class:
3120
National Item Identification Number:
002555708
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:
| 6831621 | 63005 | ROLLS-ROYCE CORPORATION | | 6831621 | 73342 | ALLISON TRANSMISSION INC |
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Techincal Specification:
| MATERIAL | PLASTIC OVERALL | | STYLE DESIGNATOR | ROUND W/SQUARE KEYS | | KEY LENGTH | 0.2000 INCHES NOMINAL | | OUTSIDE DIAMETER | 2.8650 INCHES MINIMUM AND | | 2.8850 INCHES MAXIMUM | | KEY WIDTH | 0.4300 INCHES MINIMUM AND | | 0.4500 INCHES MAXIMUM | | KEY QUANTITY | 1 | | CORNER SHAPE | SQUARE FIRST OUTSIDE CORNER | | SQUARE SECOND OUTSIDE CORNER | | SQUARE FIRST INSIDE CORNER | | SQUARE SECOND INSIDE CORNER | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | OVERALL THICKNESS | 0.0720 INCHES MINIMUM AND | | 0.0760 INCHES MAXIMUM | | CENTER HOLE SHAPE STYLE | ROUND | | DIAMETER | 2.3100 INCHES MINIMUM AND | | 2.3300 INCHES MAXIMUM | | LUBRICATION FEATURE | GROOVE FLAT BEARING SURFACE |
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