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National Stock Number:
3120-01-144-6304
Federal Supply Class:
3120
National Item Identification Number:
011446304
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:
| 201-4684478 ITEM 20 | 80064 | NAVAL SHIP SYSTEMS COMMAND | | 87776-0103 ITEM 20 | 96169 | ELECTRIC BOAT CORPORATION |
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Techincal Specification:
| CENTER HOLE SHAPE STYLE | ROUND | | CROSS-SECTIONAL SHAPE STYLE | RECTANGULAR | | DIAMETER | 6.7500 INCHES NOMINAL | | OUTSIDE DIAMETER | 10.2450 INCHES NOMINAL | | OVERALL THICKNESS | 0.3750 INCHES NOMINAL | | SPECIAL FEATURES | SIX GROOVES EQUALLY SPACED ON EACH SIDE; TWELVE INTERSECTING GROOVES ON THE OD SURFACE | | STYLE DESIGNATOR | ROUND | | SURFACE FINISH | 32.0 MICROINCHES LEFT SIDE | | SURFACE FINISH | 32.0 MICROINCHES RIGHT SIDE |
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