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National Stock Number:
5305-01-353-4552
Federal Supply Class:
5305
National Item Identification Number:
013534552
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:
| 0.250 X 20 UNC-3A X 1.250 NICUAL | 80204 | AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED | | M1222RN4C320NCNN | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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Techincal Specification:
| FASTENER LENGTH | 1.250 INCHES NOMINAL | | HEAD HEIGHT | 0.156 INCHES MINIMUM AND 0.163 INCHES MAXIMUM | | HEAD STYLE | HEXAGON | | MATERIAL | NICKEL ALLOY OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,CAP,HEXAGON HEAD | | WIDTH BETWEEN FLATS | 0.375 INCHES MINIMUM AND 0.437 INCHES MAXIMUM | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 1.150 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNC | | THREAD QUANTITY PER INCH | 20 |
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