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National Stock Number:
5305-01-020-2849
Federal Supply Class:
5305
National Item Identification Number:
010202849
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:
| HT4036-5D20 | 17446 | HUCK INTERNATIONAL, INC | | HT4036-5D20 | 56878 | SPS TECHNOLOGIES, LLC | | HT4036-5D20 | 73197 | HI-SHEAR CORPORATION | | HT4036-5D20 | 80539 | SPS TECHNOLOGIES, LLC | | HT4036-5D20 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4036-5D20 | 97928 | HUCK INTL INC | | ST3M680-5D20 | 76301 | THE BOEING COMPANY | | HT4036-5D20 | C4293 | ALCOA FASTENING SYSTEMS FAIRCHILDFASTENERS EUROPE - VSD GMBH | | HT4036-5D20 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | HT4036-5D20 | R1120 | SATAIR A/S |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.3125 INCHES | | THREAD QUANTITY PER INCH | 24 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.467 INCHES NOMINAL | | FASTENER LENGTH | 1.702 INCHES MINIMUM AND | | 1.732 INCHES MAXIMUM | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.625 INCHES MINIMUM AND | | 0.635 INCHES MAXIMUM | | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 1.240 INCHES MINIMUM AND | | 1.260 INCHES MAXIMUM | | GRIP DIAMETER | 0.3115 INCHES MINIMUM AND | | 0.3120 INCHES MAXIMUM | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.588 INCHES MINIMUM AND | | 1.608 INCHES MAXIMUM FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND | | 0.081 INCHES MAXIMUM FIRST HOLE | | SPEC/STD CONTROLLING DATA | | | MANUFACTURERS CODE | 76301 | | MFR SOURCE CONTROLLING REFERENCE | ST3M680-5D20 |
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