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National Stock Number:
5305-00-159-5385
Federal Supply Class:
5305
National Item Identification Number:
001595385
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:
| AIC672-3 | 06725 | SPS TECHNOLOGIES, LLC | | C672-3 | 81755 | LOCKHEED MARTIN CORPORATION |
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.909 INCHES NOMINAL FIRST HOLE | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 1.026 INCHES NOMINAL | | GRIP LENGTH | 0.200 INCHES NOMINAL | | GRIP DIAMETER | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM | | HEAD DIAMETER | 0.328 INCHES MINIMUM AND 0.385 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | MATERIAL DOCUMENT AND CLASSIFICATION | NAS621,COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | TITANIUM ALLOY UNS R54520 OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | SHANK UNTHREADED HOLE DIAMETER | 0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM FIRST HOLE | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.826 INCHES MINIMUM | | THREAD QUANTITY PER INCH | 32 | | THREAD SERIES DESIGNATOR | UNF |
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