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National Stock Number:
3120-01-057-4235
Federal Supply Class:
3120
National Item Identification Number:
010574235
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:
| 3A9-81A | 12763 | DYNALEC CORPORATION | | 3A9-81A | 20049 | THE ELECTRIC TACHOMETER CORP. | | PR3408-1PC81 | 12763 | DYNALEC CORPORATION | | PR3408-1PC81 | 20049 | THE ELECTRIC TACHOMETER CORP. |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CORNER SHAPE | SQUARE ALL CORNERS | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | DIAMETER | 0.1930 INCHES MINIMUM AND 0.1950 INCHES MAXIMUM | | LUBRICATION MATERIAL | LUBRICANT, MANUFACTURERS STANDARD | | OUTSIDE DIAMETER | 0.4325 INCHES MINIMUM AND 0.4375 INCHES MAXIMUM | | OVERALL THICKNESS | 0.0540 INCHES MINIMUM AND 0.0560 INCHES MAXIMUM | | MATERIAL | PLASTIC OVERALL | | STYLE DESIGNATOR | ROUND |
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