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National Stock Number:
5305-00-616-6511
Federal Supply Class:
5305
National Item Identification Number:
006166511
Description:
SCREW,CAP,HEXAGON HEAD
Detail:
An externally threaded fastener designed for insertion into holes in assembled parts, for mating with a preformed internal thread and for tightening or releasing by torquing the head. The threaded and unthreaded portions are both of the same nominal diameter of 0.190 inch (5 mm) or larger. Head dimensions and sizes of threaded and unthreaded portions shall conform to internationally recognized fastener standards. The thread length being the controlled dimension, the grip length is not specified. A locking feature may be incorporated in the design of the head or threads. Excludes BOLT, MACHINE; BOLT, EXTERNALLY RELIEVED BODY; BOLT, INTERNAL WRENCHING; and SCREW, CAP, SOCKET HEAD.
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Manufacturer Information:
| FFS85 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNC | | THREAD LENGTH | 1.000 INCHES MAXIMUM | | FASTENER LENGTH | 1.000 INCHES NOMINAL | | MATERIAL | COPPER ALLOY 655 OVERALL | | HEAD STYLE | HEXAGON | | THREAD DIRECTION | RIGHT-HAND | | NOMINAL THREAD DIAMETER | 0.500 INCHES | | THREAD QUANTITY PER INCH | 13 | | THREAD CLASS | 2A | | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-C-591 ALLOY 655 HALF-HARD FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | HEAD HEIGHT | 0.302 INCHES MINIMUM AND | | 0.323 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.736 INCHES MINIMUM AND | | 0.750 INCHES MAXIMUM | | SURFACE FINISH | 125.0 MICROINCHES BEARING SURFACE OF HEAD | | 63.0 MICROINCHES THREADS | | DEPARTURE FROM CITED DESIGNATOR | AS MODIFIED BY MATERIAL | | NONDEFINITIVE SPEC/STD DATA | 2 TYPE AND | | 10 STYLE | | SPEC/STD CONTROLLING DATA | | | MANUFACTURERS CODE | 81348 | | NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | FFS85 |
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