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		                             National Stock Number: 4730-00-375-6405
  Federal Supply Class: 4730
  National Item Identification Number: 003756405
  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:
 | 10086139 | A486G | NIMIKKEISTOKESKUS NCB FINLAND |  | 16 080118C | 81343 | SOCIETY OF AUTOMOTIVE ENGINEERS INC |  | C5924X16 | 01276 | EATON-AEROQUIP INC DIV FLUID CONNECTORS PRODUCTS |  | C5924X16 | 79470 | DANA CORP WEATHERHEAD DIV |  | J514 | 81343 | SOCIETY OF AUTOMOTIVE ENGINEERS INC |  | MIL-DTL-18866 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |  | MS51860-10 | 30327 | IMPERIAL |  | MS51860-10 | 79470 | DANA CORP WEATHERHEAD DIV |  | MS51860-10 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |  | MS51860-60 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |  | MS51860-10 | 98660 | LUBE DEVICES INC FLODAR FLUID POWER FITTINGS DIV |   
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  Techincal Specification:
 | THREAD SERIES | UN |  | NOMINAL THREAD SIZE | 1.312 INCHES |  | THREAD QUANTITY PER INCH | 12 |  | THREAD CLASS | 2B |  | THREAD DIRECTION | RIGHT-HAND |  | MATERIAL | STEEL OVERALL |  | MATERIAL DOCUMENT AND CLASSIFICATION | FED-STD-66 FED STD SINGLE MATERIAL RESPONSE OVERALL |  | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | J514 ASSN STD SINGLE TREATMENT RESPONSE AND |   | QQ-P-416, TY 2, CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |  | NUT STYLE | TUBE FITTING LOCKNUT |  | NUT HEIGHT | 0.410 INCHES NOMINAL |  | WIDTH ACROSS FLATS | 1.625 INCHES NOMINAL |  | PACKING RECESS DIAMETER | 1.317 INCHES NOMINAL |  | NOMINAL TUBE OUTSIDE DIAMETER | 1.000 INCHES |  | SPECIAL FEATURES | WEAPON SYSTEM ESSENTIAL |  | SPECIFICATION/STANDARD DATA | 96906-MS51860 GOVERNMENT STANDARD |  | CRITICALITY CODE JUSTIFICATION | FEAT |  | SPEC/STD CONTROLLING DATA |  |  | MANUFACTURERS CODE | 81349 |  | NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MIL-DTL-18866 |  | MANUFACTURERS CODE | 96906 |  | DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MS51860-60 |   
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