4820-01-431-9912 VALVE,CHECK Index 5310-01-431-9914 WASHER,RECESSED

National Stock Number:
5305-01-431-9913

Federal Supply Class:
5305

National Item Identification Number:
014319913

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:
21104851853711NAVAL SEA SYSTEMS COMMAND
752-6406821-4353711NAVAL SEA SYSTEMS COMMAND
752-6406841-3553711NAVAL SEA SYSTEMS COMMAND


Techincal Specification:
FASTENER LENGTH1.500 INCHES NOMINAL
HEAD DIAMETER0.457 INCHES MINIMUM AND 0.469 INCHES MAXIMUM
HEAD HEIGHT0.306 INCHES MINIMUM AND 0.312 INCHES MAXIMUM
HEAD STYLEFLAT FILLISTER
INTERNAL DRIVE STYLEHEXAGON
LOCKING FEATUREPATCH OR PELLET OR STRIP THREADS
MATERIALPLASTIC POLYAMIDE NYLON LOCKING FEATURE
MATERIALSTEEL OVERALL
NOMINAL THREAD DIAMETER0.312 INCHES
THREAD CLASS3A
THREAD QUANTITY PER INCH18
THREAD SERIES DESIGNATORUNRC
WIDTH ACROSS FLATS0.250 INCHES NOMINAL


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