9515-01-483-4777 ARMOR PLATE Index 4140-01-483-4779 FAN,TUBEAXIAL

National Stock Number:
5305-01-483-4778

Federal Supply Class:
5305

National Item Identification Number:
014834778

Description:
SCREW,CLOSE TOLERANCE

Detail:
A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (0.025 mm) below the minimum shank diameter, but not below the minimum major diameter for applicable class of fit, as shown in the Screw Thread Standards, FED STD H28 and/or other nationally recognized standards. The head is designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.


Manufacturer Information:
120-22597499BELL TEXTRON INC
120-225V08-0897499BELL TEXTRON INC


Techincal Specification:
CRITICALITY CODE JUSTIFICATIONAGAV
EXTENDED WASHER THICKNESS0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM
EXTENDED WASHER DIAMETER0.375 INCHES NOMINAL
FASTENER LENGTH0.516 INCHES MINIMUM AND 0.563 INCHES MAXIMUM
GRIP DIAMETER0.163 INCHES NOMINAL
GRIP LENGTH0.047 INCHES MINIMUM AND 0.075 INCHES MAXIMUM
HEAD DIAMETER0.312 INCHES NOMINAL
HEAD HEIGHT0.082 INCHES MINIMUM AND 0.092 INCHES MAXIMUM
HEAD STYLEROUND EXTENDED WASHER
INTERNAL DRIVE STYLECROSS RECESS TYPE II
MATERIAL DOCUMENT AND CLASSIFICATIONAMS4928 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALTITANIUM OVERALL
POINT LENGTH0.039 INCHES NOMINAL
POINT STYLEFLAT
PROPRIETARY CHARACTERISTICSPACS
MINIMUM TENSILE STRENGTH1425 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER0.164 INCHES
SPECIAL FEATURESEXPORT-CONTROLLED
SURFACE FINISH32.0 MICROINCHES OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONNAS4006 NATIONAL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTALUMINUM OVERALL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.422 INCHES MINIMUM AND 0.469 INCHES MAXIMUM
THREAD QUANTITY PER INCH32
THREAD SERIES DESIGNATORUNJC


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