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		                        | National Stock Number:
 3020-00-200-1493
 
 Federal Supply Class:
 3020
 
 National Item Identification Number:
 002001493
 
 Description:
 GEAR,HELICAL
 
 Detail:
 A GEAR, CYLINDRICAL IN FORM, WITH TEETH ON THE OUTER SURFACE AT AN ANGLE TO THE AXIS OF THE GEAR. SEE ALSO GEAR, ANTIBACKLASH, HELICAL:
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 Manufacturer Information:
 
 | 10-A-5281 PC 6 | 11660 | WESTINGHOUSE ELECTRIC CORP CONTROL BUSINESS UNIT |  | 10-A-5281 PC 6 | 90099 | NORTHROP GRUMMAN SYSTEMS CORPORATION |  | 10-A-5281-6 | 11660 | WESTINGHOUSE ELECTRIC CORP CONTROL BUSINESS UNIT |  | 3274894PC6 | 80064 | NAVAL SHIP SYSTEMS COMMAND | 
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 Techincal Specification:
 
 | BODY STYLE | PLAIN, SOLID |  | BORE NOMINAL DIAMETER | 2.563 INCHES BOTH ENDS |  | BORE STYLE | W/ KEYWAY BOTH ENDS |  | FACE NOMINAL WIDTH | 2.000 INCHES |  | HARDNESS RATING | 80.0 ROCKWELL A MINIMUM  AND 83.0 ROCKWELL A MAXIMUM OVERALL |  | HELIX ANGLE | 35.5000 DEGREES |  | KEYWAY NOMINAL WIDTH | 0.625 INCHES BOTH ENDS |  | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-15083,GRADE 90-60 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL |  | PITCH DIAMETER | 4.2991 INCHES NOMINAL |  | MATERIAL | STEEL COMP 90-60 OVERALL |  | NOMINAL DISTANCE FROM BORE CENTER TO KEYWAY BOTTOM | 1.533 INCHES BOTH ENDS |  | NOMINAL OUTSIDE DIAMETER | 4.6324 INCHES |  | PRESSURE ANGLE | 14.5000 DEGREES |  | SPECIAL FEATURES | 1ST END COUNTERBORED,3.432 IN. DIA BY 0.406 IN. DP |  | STYLE DESIGNATOR | HUBLESS |  | TEETH QUANTITY | 21 |  | TEETH TYPE | SINGLE HELIX |  | TOOTH FORM | STANDARD |  | TOOTH DIRECTION | LEFT | 
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