5305-01-455-9864, SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-455-9864

Federal Supply Class:
5305

National Item Identification Number:
014559864

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:

NAS1581K7T17	80205	NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE
NAS1581V7BT17	80205	NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE

Techincal Specification:

COUNTERSINK ANGLE	99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH	1.660 INCHES MINIMUM AND 1.690 INCHES MAXIMUM
GRIP DIAMETER	0.4365 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM
GRIP LENGTH	1.052 INCHES MINIMUM AND 1.072 INCHES MAXIMUM
HEAD DIAMETER	0.605 INCHES MINIMUM AND 0.674 INCHES MAXIMUM
HEAD STYLE	FLAT COUNTERSUNK
INTERNAL DRIVE STYLE	OFFSET CRUCIFORM (TORQUE SET)
MATERIAL DOCUMENT AND CLASSIFICATION	AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIAL	TITANIUM ALLOY UNS R56400 OVERALL
MINIMUM TENSILE STRENGTH	160000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER	0.438 INCHES
SPECIFICATION/STANDARD DATA	80205-NAS1581 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD
THREAD CLASS	3A
THREAD DIRECTION	RIGHT-HAND
THREAD LENGTH	0.675 INCHES NOMINAL
THREAD SERIES DESIGNATOR	UNIFIED NATIONAL JOINT FINE (UNJF)
THREAD QUANTITY PER INCH	20

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