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National Stock Number:
5305-01-097-8220
Federal Supply Class:
5305
National Item Identification Number:
010978220
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:
| 11881C4-6A | 59563 | REID PRODUCTS INC. | | 3M925C4-6A | 007R1 | TWIST TITE MFG, INC | | 3M925C4-6A | 06710 | VALLEY-TODECO, INC. | | 3M925C4-6A | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | 3M925C4-6A | 1VSL7 | HOUSTON PRECISION FASTENERS I LP | | 3M925C4-6A | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | HT4067-4-6A | 06725 | SPS TECHNOLOGIES, LLC | | HT4067-4-6A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4067-4-6A | 0PTK6 | SPS TECHNOLOGIES INC | | HT4067-4-6A | 17446 | HUCK INTERNATIONAL, INC | | HT4067-4-6A | 27624 | SPS TECHNOLOGIES LLC | | 3M925C4-6A | 76301 | THE BOEING COMPANY | | 5305PL0783827 | 9009H | INSPEKTORAT WSPARCIA SIL ZBROJNYCH | | CHT4067-4-6A | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4067-4-6A | 56878 | SPS TECHNOLOGIES, LLC | | WC4067-4-6A | 60516 | WEST COAST AEROSPACE, INC. | | HT4067-4-6A | 73197 | HI-SHEAR CORPORATION | | HT4067-4-6A | 80539 | SPS TECHNOLOGIES, LLC | | HT4067-4-6A | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4067-4-6A | 97928 | HUCK INTL INC | | HT4067-4-6A | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION | | HT4067-4-6A | 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 | 0.444 INCHES MINIMUM AND | | 0.494 INCHES MAXIMUM | | FASTENER LENGTH | 0.829 INCHES MINIMUM AND | | 0.859 INCHES MAXIMUM | | MATERIAL | STEEL COMP XM-13 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | ALUMINUM AND | | CHROMATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-83488 TY 2 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | FLAT COUNTERSUNK UNDERCUT | | HEAD DIAMETER | 0.5018 INCHES MINIMUM AND | | 0.5066 INCHES MAXIMUM | | HEAD HEIGHT | 0.0713 INCHES MINIMUM AND | | 0.0733 INCHES MAXIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 0.365 INCHES MINIMUM AND | | 0.385 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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