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National Stock Number:
5305-01-591-2898
Federal Supply Class:
5305
National Item Identification Number:
015912898
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:
| NASM90725-45 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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Techincal Specification:
| FASTENER LENGTH | 3.250 INCHES NOMINAL | | HEAD HEIGHT | 0.195 INCHES MINIMUM AND 0.211 INCHES MAXIMUM | | HEAD STYLE | HEXAGON | | MATERIAL | STEEL OVERALL | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW CAP HEXAGON HEAD (FINISHED HEXAGON BOLT) STEEL GRADE 5 CADMIUM PLATED UNC-2A | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | SPECIAL FEATURES | MATERIAL GRADE 5 | | SURFACE TREATMENT | CADMIUM OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.875 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 18 | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL COARSE (UNC) | | WIDTH BETWEEN FLATS | 0.489 INCHES MINIMUM AND 0.500 INCHES MAXIMUM |
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