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National Stock Number: 5305-01-497-8021
Federal Supply Class: 5305
National Item Identification Number: 014978021
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.
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Manufacturer Information:
0.250-20UNRC-3A X 0.500NICUAL | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M | 167-7066792-124 | 53711 | NAVAL SEA SYSTEMS COMMAND | H547-1117-124 | 96169 | ELECTRIC BOAT CORPORATION |
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Techincal Specification:
FASTENER LENGTH | 0.500 INCHES NOMINAL | HEAD STYLE | FLAT CHAMFER | MATERIAL | NICKEL ALLOY OVERALL | PROPRIETARY CHARACTERISTICS | PACS | NOMINAL THREAD DIAMETER | 0.250 INCHES | SPECIAL FEATURES | TECH DATA NOT AUTHORIZED FOR RELEASE OUTSIDE OF U.S.; ITEM IS SELF-LOCKING; PART OF BRIDGE ACCESS TRUNK, UPPER HATCH; NSSN CLASS SUBMARINE | THREAD CLASS | 3A | THREAD DIRECTION | RIGHT-HAND | THREAD QUANTITY PER INCH | 20 | THREAD SERIES DESIGNATOR | UNRC |
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