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National Stock Number:
5305-01-541-5249
Federal Supply Class:
5305
National Item Identification Number:
015415249
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:
| 11287C4-12AF | 59563 | REID PRODUCTS INC. | | 3M1169C4-12AF | 007R1 | TWIST TITE MFG, INC | | 3M1169C4-12AF | 06710 | VALLEY-TODECO, INC. | | 3M1169C4-12AF | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | 3M1169C4-12AF | 1VSL7 | HOUSTON PRECISION FASTENERS I LP | | 3M1169C4-12AF | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | 3M1169C4-12AF | 76301 | THE BOEING COMPANY | | GS1006C4-12AF | 1EM77 | B & B SPECIALTIES INC | | TX1026C4-12AF | 06725 | SPS TECHNOLOGIES, LLC | | TX1026C4-12AF | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | TX1026C4-12AF | 0PTK6 | SPS TECHNOLOGIES INC | | TX1026C4-12AF | 17446 | HUCK INTERNATIONAL, INC | | TX1026C4-12AF | 27624 | SPS TECHNOLOGIES LLC | | TX1026C4-12AF | 56878 | SPS TECHNOLOGIES, LLC | | TX1026C4-12AF | 73197 | HI-SHEAR CORPORATION | | TX1026C4-12AF | 80539 | SPS TECHNOLOGIES, LLC | | TX1026C4-12AF | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | TX1026C4-12AF | C4293 | ALCOA FASTENING SYSTEMS FAIRCHILDFASTENERS EUROPE - VSD GMBH | | TX1026C4-12AF | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | WC1169C4-12AF | 60516 | WEST COAST AEROSPACE, INC. |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 100.0 DEGREES MAXIMUM | | FASTENER LENGTH | 1.160 INCHES MINIMUM AND 1.190 INCHES MAXIMUM | | GRIP DIAMETER | 0.249 INCHES MINIMUM AND 0.250 INCHES MAXIMUM | | GRIP LENGTH | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM | | HEAD HEIGHT | 0.110 INCHES NOMINAL | | HEAD STYLE | FILLISTER COUNTERSUNK | | INTERNAL DRIVE STYLE | TORX | | PART NAME ASSIGNED BY CONTROLLING AGENCY | (INAVY) SCREW,CLOSE TOLERANCE | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SPLINE MAJOR DIAMETER | 0.221 INCHES NOMINAL | | SURFACE TREATMENT | ALUMINUM OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.425 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNJF |
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