4540-01-143-7987 HEATING ELEMENT,ELECTRICAL,NONIMMERSION TYPE Index 5340-01-143-7989 BRACKET,ANGLE

National Stock Number:
4730-01-143-7988

Federal Supply Class:
4730

National Item Identification Number:
011437988

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.


Manufacturer Information:
AN6289W488044AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE
AS48410U583SAE INTERNATIONAL
AS51790U583SAE INTERNATIONAL
AS517981343SOCIETY OF AUTOMOTIVE ENGINEERS INC
AS484181343SOCIETY OF AUTOMOTIVE ENGINEERS INC
AS5179-W4F0553ZODIAC AEROTECHNICS
AS5179W040U583SAE INTERNATIONAL
SAE-AS48410U583SAE INTERNATIONAL
AS5179W0481343SOCIETY OF AUTOMOTIVE ENGINEERS INC
AS5179W481343SOCIETY OF AUTOMOTIVE ENGINEERS INC


Techincal Specification:
THREAD SERIESUNJF
NOMINAL THREAD SIZE0.438 INCHES
THREAD QUANTITY PER INCH20
THREAD CLASS3B
THREAD DIRECTIONRIGHT-HAND
MATERIALALUMINUM ALLOY 7075 OVERALL
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-A-225/9,T73 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
SURFACE TREATMENTANODIZE OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-A-8625,TYPE 2,CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
NUT STYLETUBE FITTING LOCKNUT
NUT HEIGHT0.281 INCHES NOMINAL
WIDTH ACROSS FLATS0.688 INCHES NOMINAL
PACKING RECESS DIAMETER0.608 INCHES NOMINAL
PACKING RECESS DEPTH0.042 INCHES NOMINAL
NOMINAL TUBE OUTSIDE DIAMETER0.250 INCHES
SPECIFICATION/STANDARD DATA88044-AS5179 GOVERNMENT STANDARD


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