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National Stock Number:
5305-01-133-1572
Federal Supply Class:
5305
National Item Identification Number:
011331572
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:
| 10115341 | A486G | NIMIKKEISTOKESKUS NCB FINLAND | | HT4027-4-4 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4027-4-4 | 17446 | HUCK INTERNATIONAL, INC | | HT4027-4-4 | 56878 | SPS TECHNOLOGIES, LLC | | HT4027-4-4 | 73197 | HI-SHEAR CORPORATION | | HT4027-4-4 | 80539 | SPS TECHNOLOGIES, LLC | | ST3M557-4-4 | 007R1 | TWIST TITE MFG, INC | | ST3M557-4-4 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | WC4027-4-4 | 60516 | WEST COAST AEROSPACE, INC. | | ST3M557-4-4 | 76301 | THE BOEING COMPANY | | HT4027-4-4 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4027-4-4 | 97928 | HUCK INTL INC | | HT4027-4-4 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 0.703 INCHES MINIMUM AND 0.750 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM | | HEAD DIAMETER | 0.390 INCHES MINIMUM AND 0.395 INCHES MAXIMUM | | HEAD STYLE | OVAL COUNTERSUNK | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL DOCUMENT AND CLASSIFICATION | 23-118 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 3A | | THREAD LENGTH | 0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 28 |
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