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		                             National Stock Number: 5305-01-517-2227
  Federal Supply Class: 5305
  National Item Identification Number: 015172227
  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:
 | 0.37516UNC3A1.380T2G400SEB | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |  | 845-7108102-OA-180 | 53711 | NAVAL SEA SYSTEMS COMMAND |  | MIL-DTL-1222 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |  | MIL-S-1222 | 81349 | MILITARY SPECIFICATIONS PROMULGATED BY MILITARY DEPARTMENTS/AGENCIES UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |   
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  Techincal Specification:
 | NONDEFINITIVE SPEC/STD DATA | 2 TYPE |  | SPECIAL FEATURES | DATA IS EXPORT RESTRICTED |  | WIDTH ACROSS FLATS | 0.312 INCHES NOMINAL |  | THREAD CLASS | 3A |  | THREAD DIRECTION | RIGHT-HAND |  | THREAD LENGTH | 1.380 INCHES NOMINAL |  | THREAD QUANTITY PER INCH | 16 |  | THREAD SERIES DESIGNATOR | UNC |  | FASTENER LENGTH | 1.380 INCHES NOMINAL |  | HEAD DIAMETER | 0.550 INCHES MINIMUM AND 0.562 INCHES MAXIMUM |  | HEAD HEIGHT | 0.368 INCHES MINIMUM AND 0.375 INCHES MAXIMUM |  | HEAD STYLE | FLAT CHAMFER |  | INTERNAL DRIVE STYLE | HEXAGON |  | LOCKING FEATURE | PATCH THREADS OR PELLET THREADS OR STRIP THREADS |  | MATERIAL | NICKEL ALLOY 400 OVERALL OR NICKEL ALLOY R-405 OVERALL |  | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,SOCKET HEAD CAP, SELF LOCKING |  | PROPRIETARY CHARACTERISTICS | PACS |  | NOMINAL THREAD DIAMETER | 0.375 INCHES |   
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