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National Stock Number:
3120-00-788-2878
Federal Supply Class:
3120
National Item Identification Number:
007882878
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:
| 9189739 | 18876 | U S ARMY AVIATION AND MISSILE COMMAND |
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Techincal Specification:
| MATERIAL | STEEL COMP 303 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-STD-171 MIL STD SINGLE TREATMENT RESPONSE OVERALL | | STYLE DESIGNATOR | ROUND | | OUTSIDE DIAMETER | 1.1880 INCHES NOMINAL | | CORNER SHAPE | SQUARE ALL CORNERS | | CROSS-SECTIONAL SHAPE STYLE | COUNTERBORED | | COUNTERBORE DIAMETER | 1.0020 INCHES MINIMUM AND | | 1.0030 INCHES MAXIMUM | | COUNTERBORE DEPTH | 0.0620 INCHES NOMINAL | | OVERALL THICKNESS | 0.2500 INCHES NOMINAL | | CENTER HOLE SHAPE STYLE | ROUND | | DIAMETER | 0.7500 INCHES NOMINAL | | SURFACE FINISH | 63.0 MICROINCHES OVERALL | | LUBRICATION FEATURE | GROOVE VERTICAL COUNTERBORE SURFACE |
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