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		                        | National Stock Number:
 5310-00-520-8959
 
 Federal Supply Class:
 5310
 
 National Item Identification Number:
 005208959
 
 Description:
 WASHER,SHOULDERED
 
 Detail:
 A WASHER, ROUND IN SHAPE, AND HAVING A CENTRALLY LOCATED HOLE. ONE BEARING SURFACE IS FLAT AND UNBROKEN, THE OTHER SURFACE IS IN THE FORM OF A RAISED SHOULDER (BOSS) HAVING A FLAT BEARING SURFACE. THE THICKNESS OF THE SHOULDER (BOSS) MUST NOT EXCEED 25 PERCENT OF THE SHOULDER (BOSS) DIAMETER. FOR ITEMS HAVING A SHOULDER (BOSS) OF GREATER THICKNESS, USE BEARING, SLEEVE; BUSHING SLEEVE; OR SPACER, SLEEVE. EXCLUDES INSULATOR, WASHER AND THRUST TYPE WASHERS.
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 Manufacturer Information:
 
 | 175187-3 | 98897 | LOCKHEED MARTIN CORP | 
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 Techincal Specification:
 
 | MATERIAL | COPPER OVERALL |  | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-C-390 FED SPEC SINGLE MATERIAL RESPONSE OVERALL |  | STYLE DESIGNATOR | SHOULDERED |  | HOLE DIAMETER | 3.7500 INCHES MINIMUM AND |  |  | 3.7512 INCHES MAXIMUM |  | SHOULDER DIAMETER | 3.9398 INCHES MINIMUM AND |  |  | 3.9410 INCHES MAXIMUM |  | OUTSIDE DIAMETER | 4.250 INCHES NOMINAL |  | SHOULDER HEIGHT | 0.438 INCHES NOMINAL |  | MATERIAL THICKNESS | 0.060 INCHES MINIMUM AND |  |  | 0.065 INCHES MAXIMUM |  | SURFACE FINISH | 100.0 MICROINCHES ALL SURFACES |  | THE MANUFACTURERS DATA |  |  | MANUFACTURERS CODE | 98897 |  | DESIGN CONTROL REFERENCE | 175187-3 | 
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