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National Stock Number:
5305-00-680-4251
Federal Supply Class:
5305
National Item Identification Number:
006804251
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:
| FF-S-85 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC | | FFS85 | 81348 | FEDERAL SPECIFICATIONS PROMULGATED BY GENERAL SERVICES ADMINISTRATION WASHINGTON DC |
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Techincal Specification:
| FASTENER LENGTH | 1.750 INCHES NOMINAL | | HARDNESS RATING | 23.0 ROCKWELL B MINIMUM AND 80.0 ROCKWELL B MAXIMUM OVERALL | | HEAD HEIGHT | 0.378 INCHES MINIMUM AND 0.403 INCHES MAXIMUM | | HEAD STYLE | HEXAGON | | MATERIAL DOCUMENT AND CLASSIFICATION | SAE GR 2 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL OVERALL | | MINIMUM TENSILE STRENGTH | 74000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.625 INCHES | | NONDEFINITIVE SPEC/STD DATA | 2 TYPE AND 1OP STYLE | | WIDTH BETWEEN FLATS | 0.922 INCHES MINIMUM AND 0.938 INCHES MAXIMUM | | SURFACE FINISH | 125.0 MICROINCHES BEARING SURFACE OF HEAD | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 FED SPEC 1ST TREATMENT RESPONSE OR QQ-Z-325 FED SPEC 2ND TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OR ZINC OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 1.500 INCHES MINIMUM | | THREAD SERIES DESIGNATOR | UNC | | THREAD QUANTITY PER INCH | 11 |
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