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National Stock Number: 5305-00-551-0064
Federal Supply Class: 5305
National Item Identification Number: 005510064
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:
AN148674 | 88044 | AERONAUTICAL STANDARDS GROUP DEPT OF NAVY AND AIR FORCE |
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Techincal Specification:
THREAD SERIES DESIGNATOR | UNF | NOMINAL THREAD DIAMETER | 0.250 INCHES | THREAD QUANTITY PER INCH | 28 | THREAD CLASS | 3A | THREAD DIRECTION | RIGHT-HAND | THREAD LENGTH | 0.669 INCHES MINIMUM AND | | 0.820 INCHES MAXIMUM | FASTENER LENGTH | 1.615 INCHES MINIMUM AND | | 1.635 INCHES MAXIMUM | MATERIAL | STEEL COMP 8740 OVERALL | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6322 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | SURFACE TREATMENT | CADMIUM OVERALL | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2400 ASSN STD SINGLE TREATMENT RESPONSE OVERALL | HARDNESS RATING | 32.0 ROCKWELL C MINIMUM AND | | 36.0 ROCKWELL C MAXIMUM OVERALL | HEAD STYLE | FLAT CHAMFER | HEAD DIAMETER | 0.428 INCHES MINIMUM AND | | 0.448 INCHES MAXIMUM | HEAD HEIGHT | 0.250 INCHES MINIMUM AND | | 0.270 INCHES MAXIMUM | INTERNAL DRIVE STYLE | HEXAGON | WIDTH ACROSS FLATS | 0.219 INCHES MINIMUM AND | | 0.221 INCHES MAXIMUM | HOLE CONFIGURATION STYLE | ROUND LONGITUDINAL HOLE | HOLE TYPE | DRILLED | HOLE QUANTITY | 6 | HOLE DIAMETER | 0.070 INCHES NOMINAL | SURFACE FINISH | 63.0 MICROINCHES BEARING SURFACE OF HEAD | | 63.0 MICROINCHES GRIP | | 32.0 MICROINCHES THREADS | SPEC/STD CONTROLLING DATA | | MANUFACTURERS CODE | 88044 | DEFINITIVE GOVERNMENT SPEC/STD REFERENCE | AN148674 |
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