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		                        | National Stock Number:
 5305-01-031-4487
 
 Federal Supply Class:
 5305
 
 National Item Identification Number:
 010314487
 
 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:
 
 | 426371 | 19207 | U S ARMY TANK AUTOMOTIVE COMMAND AMSTA-IM-MM |  | 426371 | 24617 | GENERAL MOTORS CORP |  | 426371 | 7X677 | GENERAL MOTORS LLC | 
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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 | 1.250 INCHES MAXIMUM |  | FASTENER LENGTH | 1.500 INCHES MINIMUM |  | MATERIAL | STEEL COMP 4130 OVERALL |  | MATERIAL DOCUMENT AND CLASSIFICATION | AISI ASSN STD SINGLE MATERIAL RESPONSE OVERALL |  | SURFACE TREATMENT | CADMIUM AND |  |  | ZINC OVERALL |  | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 1,CLASS C FED SPEC 1ST TREATMENT RESPONSE AND |  |  | QQ-Z-325,TYPE 1,CLASS 3 FED SPEC 2ND TREATMENT RESPONSE OVERALL |  | HARDNESS RATING | 35.0 ROCKWELL C MINIMUM AND |  |  | 43.0 ROCKWELL C MAXIMUM OVERALL |  | MINIMUM TENSILE STRENGTH | 150000 POUNDS PER SQUARE INCH |  | MINIMUM YIELD STRENGTH | 135000 POUNDS PER SQUARE INCH |  | HEAD STYLE | FLAT CHAMFER |  | HEAD DIAMETER | 0.553 INCHES MINIMUM AND |  |  | 0.562 INCHES MAXIMUM |  | HEAD HEIGHT | 0.368 INCHES MINIMUM AND |  |  | 0.375 INCHES MAXIMUM |  | INTERNAL DRIVE STYLE | HEXAGON |  | WIDTH ACROSS FLATS | 0.3125 INCHES MINIMUM AND |  |  | 0.3155 INCHES MAXIMUM |  | THE MANUFACTURERS DATA |  |  | MANUFACTURERS CODE | 24617 |  | DESIGN CONTROL REFERENCE | 426371 | 
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