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National Stock Number:
3120-01-490-3337
Federal Supply Class:
3120
National Item Identification Number:
014903337
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:
| 70700-77344 | 78286 | SIKORSKY AIRCRAFT CORPORATION | | 70700-77344-137 | 78286 | SIKORSKY AIRCRAFT CORPORATION |
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Techincal Specification:
| DIAMETER | 1.3750 INCHES NOMINAL | | CENTER HOLE SHAPE STYLE | ROUND | | CORNER SHAPE | ROUND INSIDE RIGHT CORNER | | CORNER SHAPE | ROUND INSIDE LEFT CORNER | | CORNER SHAPE | SQUARE OUTSIDE LEFT CORNER | | CORNER SHAPE | SQUARE OUTSIDE RIGHT CORNER | | COUNTERBORE DEPTH | 0.5000 INCHES NOMINAL | | COUNTERBORE DIAMETER | 1.3750 INCHES NOMINAL | | CROSS-SECTIONAL SHAPE STYLE | COUNTERBORED | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-8844 MIL SPEC ALL MATERIAL RESPONSES OVERALL | | MATERIAL | STEEL OVERALL | | PROPRIETARY CHARACTERISTICS | PACS | | OUTSIDE DIAMETER | 1.7500 INCHES NOMINAL | | OVERALL THICKNESS | 0.5000 INCHES NOMINAL | | STYLE DESIGNATOR | ROUND |
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