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National Stock Number:
5305-01-439-5662
Federal Supply Class:
5305
National Item Identification Number:
014395662
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:
| 11827C4-21AF | 59563 | REID PRODUCTS INC. | | 3M1169C4-21AF | 06710 | VALLEY-TODECO, INC. | | 3M1169C4-21AF | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | 3M1169C4-21AF | 17446 | HUCK INTERNATIONAL, INC | | 3M1169C4-21AF | 1EM77 | B & B SPECIALTIES INC | | 3M1169C4-21AF | 1VSL7 | HOUSTON PRECISION FASTENERS I LP | | TX1026C4-21AF | 06725 | SPS TECHNOLOGIES, LLC | | TX1026C4-21AF | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | TX1026C4-21AF | 0PTK6 | SPS TECHNOLOGIES INC | | 3M1169C4-21AF | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | 3M1169C4-21AF | 59563 | REID PRODUCTS INC. | | 3M1169C4-21AF | 60516 | WEST COAST AEROSPACE, INC. | | 3M1169C4-21AF | 76301 | THE BOEING COMPANY | | 3M1169C4-21AF | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | TX1026C4-21AF | 27624 | SPS TECHNOLOGIES LLC | | TX1026C4-21AF | 56878 | SPS TECHNOLOGIES, LLC | | TX1026C4-21AF | 73197 | HI-SHEAR CORPORATION | | TX1026C4-21AF | 80539 | SPS TECHNOLOGIES, LLC | | TX1026C4-21AF | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | TX1026C4-21AF | C4293 | ALCOA FASTENING SYSTEMS FAIRCHILDFASTENERS EUROPE - VSD GMBH | | TX1026C4-21AF | 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 | 0.425 INCHES NOMINAL | | FASTENER LENGTH | 1.737 INCHES NOMINAL | | MATERIAL | NICKEL ALLOY 718 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | MDA23M118,CAGE76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | ALUMINUM OVERALL | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.470 INCHES MINIMUM AND | | 0.477 INCHES MAXIMUM | | HEAD HEIGHT | 0.110 INCHES MAXIMUM | | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE IA | | GRIP LENGTH | 1.312 INCHES NOMINAL | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM | | PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT |
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