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National Stock Number:
5305-00-283-7497
Federal Supply Class:
5305
National Item Identification Number:
002837497
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:
| 66904H7-27 | 50392 | SPS TECHNOLOGIES INC | | 66904H7-27 | 56878 | SPS TECHNOLOGIES, LLC | | HS2623-7Z27Y | 17446 | HUCK INTERNATIONAL, INC | | HT308-7-27 | 73197 | HI-SHEAR CORPORATION | | HS2623-7Z274 | 97928 | HUCK INTL INC | | HS2623-7Z27Y | 97928 | HUCK INTL INC | | ST3M547-7-27 | 76301 | THE BOEING COMPANY | | HT308-7-27 | 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 | 0.574 INCHES MINIMUM AND | | 0.640 INCHES MAXIMUM | | FASTENER LENGTH | 2.272 INCHES MINIMUM AND | | 2.318 INCHES MAXIMUM | | MATERIAL | STEEL OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | 23M105 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | PS 13145 FSCM 76301 MFR REF SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.880 INCHES MINIMUM AND | | 0.890 INCHES MAXIMUM | | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 1.678 INCHES MINIMUM AND | | 1.698 INCHES MAXIMUM | | GRIP DIAMETER | 0.4672 INCHES MINIMUM AND | | 0.4682 INCHES MAXIMUM | | SPECIFICATION/STANDARD DATA | 76301-ST3M547 MANUFACTURERS STANDARD |
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