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National Stock Number: 5305-00-998-5201
Federal Supply Class: 5305
National Item Identification Number: 009985201
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:
571739-3H4 | 45934 | ONTIC ENGINEERING & MANUFACTURING, INC | 571739-3H4 | 73030 | HAMILTON SUNDSTRAND CORPORATION |
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Techincal Specification:
FASTENER LENGTH | 0.250 INCHES NOMINAL | HARDNESS RATING | 38.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL | HEAD DIAMETER | 0.303 INCHES MINIMUM AND 0.312 INCHES MAXIMUM | HEAD HEIGHT | 0.185 INCHES MINIMUM AND 0.190 INCHES MAXIMUM | HEAD STYLE | FLAT CHAMFER | HOLE CONFIGURATION STYLE | ROUND LONGITUDINAL HOLE | HOLE DIAMETER | 0.046 INCHES NOMINAL | HOLE QUANTITY | 6 | HOLE TYPE | DRILLED | INTERNAL DRIVE STYLE | HEXAGON | MATERIAL DOCUMENT AND CLASSIFICATION | QQ-S-763 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | MATERIAL | STEEL COMP 410 OVERALL | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | NOMINAL THREAD DIAMETER | 0.190 INCHES | WIDTH ACROSS FLATS | 0.156 INCHES MINIMUM AND 0.158 INCHES MAXIMUM | THREAD CLASS | 3A | THREAD DIRECTION | RIGHT-HAND | THREAD LENGTH | 0.250 INCHES MAXIMUM | THREAD QUANTITY PER INCH | 32 | THREAD SERIES DESIGNATOR | UNF |
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