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National Stock Number:
5305-01-478-2840
Federal Supply Class:
5305
National Item Identification Number:
014782840
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:
| 11825-V4-21A | 59563 | REID PRODUCTS INC. | | 11845-V4-21A | 59563 | REID PRODUCTS INC. | | 3M1170V4-21A | 007R1 | TWIST TITE MFG, INC | | TX1027V4-21A | 06725 | SPS TECHNOLOGIES, LLC | | TX1027V4-21A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | 3M1170-V4-21A | 76301 | THE BOEING COMPANY | | TX1027V4-21A | 0PTK6 | SPS TECHNOLOGIES INC | | TX1027V4-21A | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | TX1027V4-21A | 27624 | SPS TECHNOLOGIES LLC | | TX1027V4-21A | 56878 | SPS TECHNOLOGIES, LLC | | TX1027V4-21A | 73197 | HI-SHEAR CORPORATION | | TX1027V4-21A | 80539 | SPS TECHNOLOGIES, LLC | | TX1027V4-21A | C4293 | ALCOA FASTENING SYSTEMS FAIRCHILDFASTENERS EUROPE - VSD GMBH | | TX1027V4-21A | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 1.727 INCHES MINIMUM AND 1.747 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM | | HEAD DIAMETER | 0.385 INCHES MINIMUM AND 0.394 INCHES MAXIMUM | | HEAD HEIGHT | 0.060 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | TORX | | MATERIAL DOCUMENT AND CLASSIFICATION | NAS4004 NATIONAL SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | TITANIUM ALLOY UNS R56400 OVERALL | | MINIMUM TENSILE STRENGTH | 4230 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SPLINE MAJOR DIAMETER | 0.219 INCHES MINIMUM AND 0.222 INCHES MAXIMUM | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 3A | | THREAD LENGTH | 0.415 INCHES MINIMUM AND 0.435 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 28 |
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