5998-01-356-8975 PRINTED WIRING BOARD Index 5305-01-356-8977 SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-356-8976

Federal Supply Class:
5305

National Item Identification Number:
013568976

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:
53A-00-199-832386ILLINOIS TOOL WKS INC LINAC DIV
53A-00-199-853711NAVAL SEA SYSTEMS COMMAND


Techincal Specification:
THREAD SERIES DESIGNATORUNF
NOMINAL THREAD DIAMETER0.312 INCHES
THREAD QUANTITY PER INCH24
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.874 INCHES MINIMUM AND
1.064 INCHES MAXIMUM
FASTENER LENGTH1.469 INCHES MINIMUM AND
1.500 INCHES MAXIMUM
MATERIALNICKEL ALLOY 400 OVERALL
PLASTIC POLYAMIDE THREADS
MATERIAL DOCUMENT AND CLASSIFICATIONQQN281,CLA FED SPEC SINGLE MATERIAL RESPONSE OVERALL
HEAD STYLEFLAT CHAMFER
HEAD DIAMETER0.457 INCHES MINIMUM AND
0.469 INCHES MAXIMUM
HEAD HEIGHT0.306 INCHES MINIMUM AND
0.313 INCHES MAXIMUM
INTERNAL DRIVE STYLEHEXAGON
WIDTH ACROSS FLATS0.250 INCHES MINIMUM AND
0.253 INCHES MAXIMUM
LOCKING FEATURESTRIP THREADS


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