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		                        | National Stock Number:
 4730-00-865-4939
 
 Federal Supply Class:
 4730
 
 National Item Identification Number:
 008654939
 
 Description:
 LOCKNUT,TUBE FITTING
 
 Detail:
 AN ITEM WITH INTERNAL MACHINE THREADS DESIGNED TO FIT THE EXTERNAL MACHINE THREADS OF A TUBE FITTING. IT HAS FLAT FACES, ONE OF WHICH HAS A COUNTERBORED RECESS TO ACCOMMODATE PACKING, PACKING OR SEALING RING(S), GASKET(S), AND THE LIKE. THE ITEM, WHEN INSTALLED, PROVIDES A METHOD OF LOCKING AND SEALING THE CONNECTION. SEE ALSO LOCKNUT, PIPE; NUT (1), TUBE COUPLING AND NUT (1), PLAIN, HEXAGON.
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 Manufacturer Information:
 
 | 516-1414593PC291 | 80064 | NAVAL SHIP SYSTEMS COMMAND | 
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 Techincal Specification:
 
 | THREAD SERIES | UN |  | NOMINAL THREAD SIZE | 1.625 INCHES |  | THREAD QUANTITY PER INCH | 12 |  | THREAD CLASS | 3B |  | THREAD DIRECTION | RIGHT-HAND |  | MATERIAL | ALUMINUM ALLOY OVERALL |  | NUT STYLE | TUBE FITTING LOCKNUT |  | WIDTH ACROSS FLATS | 1.938 INCHES NOMINAL |  | PACKING RECESS DIAMETER | 1.854 INCHES NOMINAL |  | PACKING RECESS DEPTH | 0.054 INCHES NOMINAL |  | NOMINAL TUBE OUTSIDE DIAMETER | 1.250 INCHES | 
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