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National Stock Number:
3120-01-258-0897
Federal Supply Class:
3120
National Item Identification Number:
012580897
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:
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Techincal Specification:
| CENTER HOLE KEYWAY QUANTITY | 8 | | CENTER HOLE SHAPE STYLE | ROUND W/KEYWAYS | | CORNER SHAPE | SQUARE ALL CORNERS | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | HARDNESS RATING | 45.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL | | KEYWAY QUANTITY | 8 | | KEYWAY RADIUS | 0.0300 INCHES MINIMUM AND 0.0500 INCHES MAXIMUM | | MAJOR DIAMETER | 1.9010 INCHES MINIMUM AND 1.9050 INCHES MAXIMUM | | OVERALL THICKNESS | 0.1630 INCHES MINIMUM AND 0.1670 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | SAE ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 1552 OVERALL | | MINOR DIAMETER | 1.7550 INCHES MINIMUM AND 1.7650 INCHES MAXIMUM | | OUTSIDE DIAMETER | 2.2800 INCHES NOMINAL | | STYLE DESIGNATOR | ROUND W/KEYWAYS | | SURFACE CONDITION | GROUND | | WASHER KEYWAY DEPTH | 0.0100 INCHES MINIMUM AND 0.0300 INCHES MAXIMUM |
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