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National Stock Number:
3120-01-331-1621
Federal Supply Class:
3120
National Item Identification Number:
013311621
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:
| 5821032 | 53711 | NAVAL SEA SYSTEMS COMMAND |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CORNER SHAPE | CHAMFERED FIRST OUTSIDE CORNER | | CORNER SHAPE | CHAMFERED FIRST INSIDE CORNER | | CORNER SHAPE | CHAMFERED SECOND INSIDE CORNER | | CORNER SHAPE | CHAMFERED SECOND OUTSIDE CORNER | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | DIAMETER | 0.2803 INCHES MINIMUM AND 0.2809 INCHES MAXIMUM | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-C-465M ALLOY 642 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | COPPER ALLOY 642 OVERALL | | OUTSIDE DIAMETER | 0.4989 INCHES MINIMUM AND 0.4999 INCHES MAXIMUM | | OVERALL THICKNESS | 0.0480 INCHES MINIMUM AND 0.0520 INCHES MAXIMUM | | STYLE DESIGNATOR | ROUND |
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