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		                        | National Stock Number:
 5305-01-020-2441
 
 Federal Supply Class:
 5305
 
 National Item Identification Number:
 010202441
 
 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:
 
 | 418102-1 | 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 | 0.359 INCHES MINIMUM AND |  |  | 0.391 INCHES MAXIMUM |  | FASTENER LENGTH | 0.359 INCHES MINIMUM AND |  |  | 0.391 INCHES MAXIMUM |  | MATERIAL | STEEL OVERALL |  | SURFACE TREATMENT | CADMIUM OVERALL |  | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 1,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL |  | HARDNESS RATING | 26.0 ROCKWELL C MINIMUM AND |  |  | 32.0 ROCKWELL C MAXIMUM OVERALL |  | HEAD STYLE | FLAT CHAMFER |  | HEAD DIAMETER | 0.550 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 | 0.312 INCHES MINIMUM |  | SURFACE FINISH | 250.0 MICROINCHES OVERALL |  | THE MANUFACTURERS DATA |  |  | MANUFACTURERS CODE | 80020 |  | DESIGN CONTROL REFERENCE | 418102-1 | 
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