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National Stock Number:
3120-01-386-9184
Federal Supply Class:
3120
National Item Identification Number:
013869184
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:
| MS21783-03082 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CORNER SHAPE | SQUARE ALL CORNERS | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | DIAMETER | 0.1900 INCHES MINIMUM AND 0.2020 INCHES MAXIMUM | | MATERIAL | COPPER ALLOY 841 OVERALL | | OUTSIDE DIAMETER | 0.4950 INCHES NOMINAL | | OVERALL THICKNESS | 0.0600 INCHES MINIMUM AND 0.0620 INCHES MAXIMUM | | STYLE DESIGNATOR | ROUND | | SURFACE FINISH | 32.0 MICROINCHES RIGHT SIDE | | SURFACE FINISH | 32.0 MICROINCHES LEFT SIDE |
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