1560-01-521-6769 FAIRING,AIRCRAFT Index 5310-01-521-6771 WASHER,FLAT

National Stock Number:
5305-01-521-6770

Federal Supply Class:
5305

National Item Identification Number:
015216770

Description:
SCREW,CAP,SOCKET HEAD

Detail:
An externally threaded fastener whose threaded portion is of one nominal diameter. The head has an internal socket or multiple spline for use with an inserted driver. A locking feature may be incorporated in the design of the head or threads. Excludes items with bevel (conical) heads. See BOLT, INTERNAL WRENCHING. Excludes SCREW, SHOULDER; and SCREW, MACHINE.


Manufacturer Information:
AES43M407025CH1A8105047THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
B18.3.105047THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS
B1831BH040025N80204AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED


Techincal Specification:
EXTERNAL THREAD TOLERANCE CLASS6G
FASTENER LENGTH25.0 MILLIMETERS NOMINAL
HEAD DIAMETER6.80 MILLIMETERS MINIMUM AND 7.00 MILLIMETERS MAXIMUM
HEAD HEIGHT3.88 MILLIMETERS MINIMUM AND 4.00 MILLIMETERS MAXIMUM
HEAD STYLEFLAT CHAMFER
INTERNAL DRIVE STYLEHEXAGON
MATERIALSTEEL PROPERTY CLASS 12.9 OVERALL
NOMINAL THREAD DIAMETER4.0 MILLIMETERS
WIDTH ACROSS FLATS4.020 MILLIMETERS MINIMUM AND 4.084 MILLIMETERS MAXIMUM
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONASTMB633FE/ZN5,TYII ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTZINC OVERALL
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH23.5 MILLIMETERS NOMINAL
THREAD SERIES DESIGNATORM
THREAD PITCH IN MILLIMETERS0.7


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