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National Stock Number:
5305-01-417-2493
Federal Supply Class:
5305
National Item Identification Number:
014172493
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:
| 10113798 | A486G | NIMIKKEISTOKESKUS NCB FINLAND | | 11827V-4-18/11827V4-18A | 59563 | REID PRODUCTS INC. | | 3M1169V4-18A | 007R1 | TWIST TITE MFG, INC | | 3M1169V4-18A | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | 3M1169V4-18A | 76301 | THE BOEING COMPANY | | 3M1169V-4-18 | 76301 | THE BOEING COMPANY | | TX1026V-4-18 | 06725 | SPS TECHNOLOGIES, LLC | | TX1026V4-18A | 06725 | SPS TECHNOLOGIES, LLC | | TX1026V4-18A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | TX1026V4-18A | 0PTK6 | SPS TECHNOLOGIES INC | | GS1006V4-18A | 1EM77 | B & B SPECIALTIES INC | | TX1026V4-18A | 27624 | SPS TECHNOLOGIES LLC | | TX1026V4-18A | 56878 | SPS TECHNOLOGIES, LLC | | TX1026V4-18A | 73197 | HI-SHEAR CORPORATION | | WC1169V-4-18A | 60515 | DYNAQUIP CONTROLS CORPORATION | | TX1026V4-18A | 80539 | SPS TECHNOLOGIES, LLC | | TX1026V4-18A | C4293 | ALCOA FASTENING SYSTEMS FAIRCHILDFASTENERS EUROPE - VSD GMBH | | TX1026V4-18A | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.106 INCHES NOMINAL | | FASTENER LENGTH | 1.216 INCHES MINIMUM AND | | 1.246 INCHES MAXIMUM | | MATERIAL | TITANIUM ALLOY UNS R56400 OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | HEAD STYLE | FLAT COUNTERSUNK UNDERCUT | | HEAD DIAMETER | 0.470 INCHES MINIMUM AND | | 0.497 INCHES MAXIMUM | | HEAD HEIGHT | 0.110 INCHES NOMINAL | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE II | | GRIP LENGTH | 1.115 INCHES MINIMUM AND | | 1.135 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM |
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