5305-01-483-4778, SCREW,CLOSE TOLERANCE

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:

120-225	97499	BELL TEXTRON INC
120-225V08-08	97499	BELL TEXTRON INC

Techincal Specification:

CRITICALITY CODE JUSTIFICATION	AGAV
EXTENDED WASHER THICKNESS	0.023 INCHES MINIMUM AND 0.028 INCHES MAXIMUM
EXTENDED WASHER DIAMETER	0.375 INCHES NOMINAL
FASTENER LENGTH	0.516 INCHES MINIMUM AND 0.563 INCHES MAXIMUM
GRIP DIAMETER	0.163 INCHES NOMINAL
GRIP LENGTH	0.047 INCHES MINIMUM AND 0.075 INCHES MAXIMUM
HEAD DIAMETER	0.312 INCHES NOMINAL
HEAD HEIGHT	0.082 INCHES MINIMUM AND 0.092 INCHES MAXIMUM
HEAD STYLE	ROUND EXTENDED WASHER
INTERNAL DRIVE STYLE	CROSS RECESS TYPE II
MATERIAL DOCUMENT AND CLASSIFICATION	AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	TITANIUM OVERALL
POINT LENGTH	0.039 INCHES NOMINAL
POINT STYLE	FLAT
PROPRIETARY CHARACTERISTICS	PACS
MINIMUM TENSILE STRENGTH	1425 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.164 INCHES
SPECIAL FEATURES	EXPORT-CONTROLLED
SURFACE FINISH	32.0 MICROINCHES OVERALL
SURFACE TREATMENT DOCUMENT AND CLASSIFICATION	NAS4006 NATIONAL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENT	ALUMINUM OVERALL
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.422 INCHES MINIMUM AND 0.469 INCHES MAXIMUM
THREAD QUANTITY PER INCH	32
THREAD SERIES DESIGNATOR	UNJC

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