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National Stock Number:
5305-01-110-9771
Federal Supply Class:
5305
National Item Identification Number:
011109771
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:
| 11881C4-8A | 59563 | REID PRODUCTS INC. | | 3M925C4-8A | 007R1 | TWIST TITE MFG, INC | | 3M925C4-8A | 06710 | VALLEY-TODECO, INC. | | 3M925C4-8A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | 3M925C4-8A | 0PTK6 | SPS TECHNOLOGIES INC | | 3M925C4-8A | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | 3M925C4-8A | 17446 | HUCK INTERNATIONAL, INC | | 3M925C4-8A | 1VSL7 | HOUSTON PRECISION FASTENERS I LP | | 3M925C4-8A | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | 3M925C4-8A | 60516 | WEST COAST AEROSPACE, INC. | | 3M925C4-8A | 73197 | HI-SHEAR CORPORATION | | 3M925C4-8A | 76301 | THE BOEING COMPANY | | 3M925C4-8A | 80539 | SPS TECHNOLOGIES, LLC | | 3M925C4-8A | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION | | HT4067-4-8A | 06725 | SPS TECHNOLOGIES, LLC | | HT4067-4-8A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | CHT4067-4-8A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4067-4-8A | 0PTK6 | SPS TECHNOLOGIES INC | | HT4067-4-8A | 17446 | HUCK INTERNATIONAL, INC | | HT4067-4-8A | 27624 | SPS TECHNOLOGIES LLC | | HT4067-4-8A | 56878 | SPS TECHNOLOGIES, LLC | | WC4067-4-8A | 60515 | DYNAQUIP CONTROLS CORPORATION | | HT4067-4-8A | 73197 | HI-SHEAR CORPORATION | | HT4067-4-8A | 80539 | SPS TECHNOLOGIES, LLC | | HT4067-4-8A | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | CHT4067-4-8A | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4067-4-8A | 97928 | HUCK INTL INC | | 642AS1631-3 | D9182 | ZF INDUSTRIEANTRIEBE WITTEN GMBH | | HT4067-4-8A | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION | | HT4067-4-8A | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | WC4067-4-8A | 60516 | WEST COAST AEROSPACE, 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 | 0.443 INCHES MINIMUM AND | | 0.493 INCHES MAXIMUM | | FASTENER LENGTH | 0.953 INCHES MINIMUM AND | | 0.983 INCHES MAXIMUM | | MATERIAL | STEEL COMP XM-13 OVERALL | | SURFACE TREATMENT | ALUMINUM AND | | CHROMATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-83488,TYPE2,CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | FLAT COUNTERSUNK UNDERCUT | | HEAD DIAMETER | 0.502 INCHES MINIMUM AND | | 0.507 INCHES MAXIMUM | | HEAD HEIGHT | 0.071 INCHES MINIMUM AND | | 0.073 INCHES MAXIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 0.490 INCHES MINIMUM AND | | 0.510 INCHES MAXIMUM | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | 32.0 MICROINCHES THREADS | | SPECIAL FEATURES | FURNISHED WITH ONE O-RING |
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