5305-01-188-1660 SCREW,CAP,SOCKET HEAD Index 5305-01-188-1663 SCREW,CAP,HEXAGON HEAD

National Stock Number:
5305-01-188-1661

Federal Supply Class:
5305

National Item Identification Number:
011881661

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:
515-204817680064NAVAL SHIP SYSTEMS COMMAND
515-2048176-3280064NAVAL SHIP SYSTEMS COMMAND
71201-93X1PC3296169ELECTRIC BOAT CORPORATION


Techincal Specification:
CRITICALITY CODE JUSTIFICATIONZZZY
FASTENER LENGTH1.750 INCHES NOMINAL
HEAD DIAMETER0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM
HEAD HEIGHT0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM
HEAD STYLEFLAT CHAMFER
INTERNAL DRIVE STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONQQ-N-286 FED SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALNICKEL ALLOY OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES
REFERENCE NUMBER DIFFERENTIATING CHARACTERISTICSMATERIAL WILL BE IN ACCORDANCE WITH SHIPS PARTS CONTROL CENTER ACTIVITY HX QUALITY CONTROL,MANUFACTURING AND TESTING SPECIFICATIONS
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH1.750 INCHES NOMINAL
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)
THREAD QUANTITY PER INCH20
WIDTH ACROSS FLATS0.187 INCHES NOMINAL


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