5305-00-560-5553 SCREW,MACHINE Index 5305-00-560-5558 SETSCREW

National Stock Number:
5305-00-560-5554

Federal Supply Class:
5305

National Item Identification Number:
005605554

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.


Manufacturer Information:
900052318876U S ARMY AVIATION AND MISSILE COMMAND


Techincal Specification:
FASTENER LENGTH0.750 INCHES NOMINAL
HEAD DIAMETER0.265 INCHES MINIMUM AND 0.270 INCHES MAXIMUM
HEAD HEIGHT0.160 INCHES MINIMUM AND 0.164 INCHES MAXIMUM
HEAD STYLEFLAT CHAMFER
INTERNAL DRIVE STYLEHEXAGON
MATERIALSTEEL OVERALL
NOMINAL THREAD DIAMETER0.164 INCHES
WIDTH ACROSS FLATS0.125 INCHES MINIMUM AND 0.127 INCHES MAXIMUM
SURFACE TREATMENTCHROMATE ZINC OVERALL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.578 INCHES MINIMUM
THREAD QUANTITY PER INCH32
THREAD SERIES DESIGNATORUNC


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