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National Stock Number:
5305-00-479-0016
Federal Supply Class:
5305
National Item Identification Number:
004790016
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:
| 64040H5-25 | 56878 | SPS TECHNOLOGIES, LLC | | 64040H5-25 | 80539 | SPS TECHNOLOGIES, LLC | | AIC1023H5-25 | 06725 | SPS TECHNOLOGIES, LLC | | HR101H5-25 | 73197 | HI-SHEAR CORPORATION | | C387H5-25 | 81755 | LOCKHEED MARTIN CORPORATION | | CS318642H5-25 | 93907 | TEXTRON FASTENING SYSTEMS DBA DECORAH OPERATIONS TFS | | VT1039H5-25 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | VT1039H5-25 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HR101H5-25 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 60.0 DEGREES NOMINAL | | FASTENER LENGTH | 1.995 INCHES MINIMUM AND 2.025 INCHES MAXIMUM | | GRIP DIAMETER | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM | | GRIP LENGTH | 1.552 INCHES MINIMUM AND 1.572 INCHES MAXIMUM | | HEAD DIAMETER | 0.531 INCHES MINIMUM AND 0.558 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS6485 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP H11 OVERALL | | MINIMUM TENSILE STRENGTH | 220000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | SPECIAL FEATURES | BEARING SURFACE OF HEAD GROOVED TO 0.394 IN. MIN 0.396 IN. MAX DIA,0.092 IN. MIN 0.097 IN. MAX DISTANCE FROM TOP OF HEAD | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2416 ASSN STD ALL TREATMENT RESPONSES OVERALL | | SURFACE TREATMENT | NICKEL AND CADMIUM OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.423 INCHES MINIMUM AND 0.473 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 24 | | THREAD SERIES DESIGNATOR | UNF |
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