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National Stock Number:
5305-01-049-8191
Federal Supply Class:
5305
National Item Identification Number:
010498191
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.
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Manufacturer Information:
| 11909V7L12M1 | 59563 | REID PRODUCTS INC. | | HT4028L7-12M | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4028L7-12M | 17446 | HUCK INTERNATIONAL, INC | | HT4028L7-12M | 73197 | HI-SHEAR CORPORATION | | HT4028L7-12M | 80539 | SPS TECHNOLOGIES, LLC | | HT4028L7-12M | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | ST3M466V7L12M1 | 76301 | THE BOEING COMPANY | | ST3M466V7L12M1 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4028L7-12M | 97928 | HUCK INTL INC | | ST3M466V7L12M1 | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION | | HT4028L7-12M | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.438 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.631 INCHES MINIMUM AND | | 0.681 INCHES MAXIMUM | | FASTENER LENGTH | 1.391 INCHES MINIMUM AND | | 1.421 INCHES MAXIMUM | | MATERIAL | TITANIUM ALLOY OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | HEAD STYLE | OVAL COUNTERSUNK | | HEAD DIAMETER | 0.662 INCHES MINIMUM AND | | 0.668 INCHES MAXIMUM | | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 0.740 INCHES MINIMUM AND | | 0.760 INCHES MAXIMUM | | GRIP DIAMETER | 0.4365 INCHES MINIMUM AND | | 0.4370 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | 32.0 MICROINCHES TOP OF HEAD | | 32.0 MICROINCHES THREADS | | SPECIAL FEATURES | DRY FILM LUBRICANT P.S. 18021 CL 1 | | SPECIFICATION/STANDARD DATA | 76301-ST3M466 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
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