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		                             National Stock Number: 5310-00-166-1403
  Federal Supply Class: 5310
  National Item Identification Number: 001661403
  Description: NUT,SELF-LOCKING,HEXAGON
  Detail: A nut having a flat bottom and 6 sides. An integral feature is incorporated for locking on the threads of a mating member. Excludes NUT (1), SELF-LOCKING, CAP. 
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  Manufacturer Information:
 | 43781 | 019L2 | ESNA, LLC |  | 43781 | 56878 | SPS TECHNOLOGIES, LLC |  | D52NEE-070 | 019L2 | ESNA, LLC |  | D52NEE-070 | 72962 | HARVARD INDUSTRIES INC |  | 43781 | 77445 | RTX CORPORATION |   
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  Techincal Specification:
 | THREAD DIRECTION | RIGHT-HAND |  | MATERIAL | PLASTIC POLYAMIDE LOCKING INSERT |   | STEEL COMP 1137 NUT |  | NUT STYLE | HEXAGON |  | LOCKING FEATURE | PREVAILING TORQUE WITH NONMETALLIC INSERT |  | BEARING SURFACE TYPE | CHAMFERED |  | THREAD SERIES | UNF |  | NOMINAL THREAD SIZE | 0.438 INCHES |  | THREAD QUANTITY PER INCH | 20 |  | THREAD CLASS | 3B |  | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5024 ASSN STD SINGLE MATERIAL RESPONSE NUT |  | SURFACE TREATMENT | CADMIUM AND |   | CHROMATE OVERALL EXCEPT INSERT |  | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL EXCEPT INSERT |  | NUT HEIGHT | 0.438 INCHES MINIMUM AND |   | 0.468 INCHES MAXIMUM |  | WIDTH ACROSS FLATS | 0.616 INCHES MINIMUM AND |   | 0.627 INCHES MAXIMUM |  | SPEC/STD CONTROLLING DATA |  |  | MANUFACTURERS CODE | 77445 |  | MFR SOURCE CONTROLLING REFERENCE | 43781 |   
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