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		                        | National Stock Number:
 5305-00-007-2816
 
 Federal Supply Class:
 5305
 
 National Item Identification Number:
 000072816
 
 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:
 
 | 509440-626 | 80020 | NAVAL AIR WARFARE CENTER AIRCRAFT DIVISION CODE 4.8.8.0.0.B BLDG 148-2 | 
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 Techincal Specification:
 
 | THREAD SERIES DESIGNATOR | UNC |  | NOMINAL THREAD DIAMETER | 0.375 INCHES |  | THREAD QUANTITY PER INCH | 16 |  | THREAD CLASS | 3A |  | THREAD DIRECTION | RIGHT-HAND |  | THREAD LENGTH | 1.625 INCHES MINIMUM |  | FASTENER LENGTH | 3.250 INCHES NOMINAL |  | MATERIAL | STEEL COMP 4140 OR |  |  | STEEL COMP E4340 OR |  |  | STEEL COMP 6150 OR |  |  | STEEL COMP 8735 OR |  |  | STEEL COMP 8740 OVERALL |  | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 MIL SPEC 1ST MATERIAL RESPONSE OR |  |  | MIL-S-5000 MIL SPEC 2ND MATERIAL RESPONSE OR |  |  | MIL-S-8503 MIL SPEC 3RD MATERIAL RESPONSE OR |  |  | MIL-S-6098 MIL SPEC 4TH MATERIAL RESPONSE OR |  |  | MIL-S-6049 MIL SPEC 5TH MATERIAL RESPONSE OVERALL |  | HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND |  |  | 43.0 ROCKWELL C MAXIMUM OVERALL |  | MINIMUM YIELD STRENGTH | 130000 POUNDS PER SQUARE INCH |  | HEAD STYLE | FLAT CHAMFER |  | HEAD DIAMETER | 0.563 INCHES MAXIMUM |  | HEAD HEIGHT | 0.375 INCHES MAXIMUM |  | INTERNAL DRIVE STYLE | HEXAGON |  | WIDTH ACROSS FLATS | 0.312 INCHES NOMINAL |  | SURFACE FINISH | 125.0 MICROINCHES OVERALL |  | TEST DATA DOCUMENT | 81349-MILI6868 SPECIFICATION (INCLUDES ENGINEERING TYPE BULLETINS, BROCHURES,ETC., THAT REFLECT SPECIFICATION TYPE DATA IN SPECIFICATION FORMAT; EXCLUDES COMMERCIAL CATALOGS, INDUSTRY DIRECTORIES, AND SIMILAR TRADE PUBLICATIONS, REFLECTING GENERAL TYPE DATA ON CERTAIN ENVIRONMENTAL AND PERFORMANCE REQUIREMENTS AND TEST CONDITIONS THAT ARE SHOWN AS "TYPICAL", "AVERAGE", "NOMINAL", ETC.). |  | PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT | 
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