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National Stock Number:
3120-01-233-8738
Federal Supply Class:
3120
National Item Identification Number:
012338738
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:
| 2-24434 | 77873 | ROCKFORD POWERTRAIN INC | | 2-969-838-24434 | 77873 | ROCKFORD POWERTRAIN INC | | B314926 | 77873 | ROCKFORD POWERTRAIN INC |
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Techincal Specification:
| DIAMETER | 3.1390 INCHES MINIMUM AND 3.1400 INCHES MAXIMUM | | CENTER HOLE KEYWAY QUANTITY | 2 | | CENTER HOLE KEYWAY RADIUS | 0.3125 INCHES NOMINAL | | CENTER HOLE SHAPE STYLE | ROUND W/ROUND KEYWAY | | CORNER SHAPE | SQUARE ALL CORNERS | | COUNTERBORE DEPTH | 0.2812 INCHES MINIMUM AND 0.2900 INCHES MAXIMUM | | COUNTERBORE DIAMETER | 3.1390 INCHES MINIMUM AND 3.1400 INCHES MAXIMUM | | CROSS-SECTIONAL SHAPE STYLE | COUNTERBORED | | KEYWAY QUANTITY | 2 | | KEYWAY RADIUS | 0.2500 INCHES NOMINAL | | MATERIAL | COPPER ALLOY OVERALL | | PROPRIETARY CHARACTERISTICS | PACS | | OUTSIDE DIAMETER | 3.7911 INCHES MINIMUM AND 3.7921 INCHES MAXIMUM | | OVERALL THICKNESS | 0.4470 INCHES MINIMUM AND 0.4620 INCHES MAXIMUM | | STYLE DESIGNATOR | ROUND W/KEYWAYS |
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