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National Stock Number:
5305-00-369-1710
Federal Supply Class:
5305
National Item Identification Number:
003691710
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:
| 3M123-4-7 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | 3M123-4-7 | 17446 | HUCK INTERNATIONAL, INC | | 3M123-4-7 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | 3M123-4-7 | 73197 | HI-SHEAR CORPORATION | | 3M123-4-7 | 76301 | THE BOEING COMPANY | | 3M123-4-7 | 80539 | SPS TECHNOLOGIES, LLC | | HT1029A4-7 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | 54291-4-7 | 0PTK6 | SPS TECHNOLOGIES INC | | 54291-4-7 | 0PTL6 | KWA ASSOCIATES INC | | HT123-4-7 | 17446 | HUCK INTERNATIONAL, INC | | 54291-4-7 | 56878 | SPS TECHNOLOGIES, LLC | | 54291-4-7 | 80539 | SPS TECHNOLOGIES, LLC | | HT1029A4-7 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT123-4-7 | 97928 | HUCK INTL INC | | HT4N-7 | 73197 | HI-SHEAR CORPORATION | | HT4N-7 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 100.0 DEGREES MINIMUM | | FASTENER LENGTH | 0.890 INCHES MINIMUM AND 0.937 INCHES MAXIMUM | | GRIP LENGTH | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | HEAD DIAMETER | 0.501 INCHES MINIMUM AND 0.506 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | IRON ALLOY 660 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.442 INCHES MINIMUM AND 0.509 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 28 |
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