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		                             National Stock Number: 5305-01-409-0300
  Federal Supply Class: 5305
  National Item Identification Number: 014090300
  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:
 | 211046433 | 53711 | NAVAL SEA SYSTEMS COMMAND |  | 801-6405317 FIND 1 | 53711 | NAVAL SEA SYSTEMS COMMAND |  | B18.3-0.375X6.00CLINDSOCHDNICU | 80204 | AMERICAN NATIONAL STANDARDS INSTITUTE INCORPORATED |  | 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:
 | THREAD SERIES DESIGNATOR | UNRC |  | NOMINAL THREAD DIAMETER | 0.375 INCHES |  | THREAD QUANTITY PER INCH | 16 |  | THREAD CLASS | 3A |  | THREAD DIRECTION | RIGHT-HAND |  | THREAD LENGTH | 1.810 INCHES MINIMUM AND |   | 2.500 INCHES MAXIMUM |  | FASTENER LENGTH | 5.940 INCHES MINIMUM AND |   | 6.000 INCHES MAXIMUM |  | MATERIAL | PLASTIC POLYAMIDE LOCKING FEATURE |   | NICKEL ALLOY 400 FASTENER |  | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-F-18240 MIL SPEC SINGLE MATERIAL RESPONSE LOCKING FEATURE |   | QQ-N-281 FED SPEC SINGLE MATERIAL RESPONSE FASTENER |  | HARDNESS RATING | 80.0 ROCKWELL B MINIMUM OVERALL |  | MINIMUM TENSILE STRENGTH | 80000 POUNDS PER SQUARE INCH |  | HEAD STYLE | FLAT CHAMFER |  | HEAD DIAMETER | 0.550 INCHES MINIMUM AND |   | 0.562 INCHES MAXIMUM |  | HEAD HEIGHT | 0.366 INCHES MINIMUM AND |   | 0.375 INCHES MAXIMUM |  | INTERNAL DRIVE STYLE | HEXAGON |  | WIDTH ACROSS FLATS | 0.312 INCHES NOMINAL |  | LOCKING FEATURE | PATCH OR |   | STRIP THREADS |  | NONDEFINITIVE SPEC/STD DATA | 2 TYPE |  | SPEC/STD CONTROLLING DATA |  |  | MANUFACTURERS CODE | 81349 |  | NON-DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | MIL-DTL-1222 |   
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