5305-01-598-7421 SCREW,CAP,SOCKET HEAD 5305-01-598-7554 SCREW,TAPPING

National Stock Number:
5305-01-598-7540

Federal Supply Class:
5305

National Item Identification Number:
015987540

Description:
SCREW,CAP,HEXAGON 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:
0.250-20UNC-2AX1.625 NICU53711NAVAL SEA SYSTEMS COMMAND
709-8345733-046-002C53711NAVAL SEA SYSTEMS COMMAND


Techincal Specification:
FASTENER LENGTH1.625 INCHES NOMINAL
HEAD DIAMETER0.365 INCHES MINIMUM AND 0.375 INCHES MAXIMUM
HEAD HEIGHT0.244 INCHES MINIMUM AND 0.250 INCHES MAXIMUM
HEAD STYLEFLAT FILLISTER
KEY LENGTH0.120 INCHES MINIMUM
MATERIALALUMINUM AND NICKEL OVERALL
PART NAME ASSIGNED BY CONTROLLING AGENCYSCREW, MACHINE, HEX HEAD
NOMINAL THREAD DIAMETER0.250 INCHES
THREAD CLASS2A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.750 INCHES NOMINAL
THREAD QUANTITY PER INCH20
THREAD SERIES DESIGNATORUNIFIED NATIONAL COARSE (UNC)


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