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National Stock Number:
5305-01-027-2005
Federal Supply Class:
5305
National Item Identification Number:
010272005
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:
| 11925C3-7A | 59563 | REID PRODUCTS INC. | | CHT4020-3-7A | 17419 | DEUTSCH CO THE | | HT4020-3-7A | 06725 | SPS TECHNOLOGIES, LLC | | HT4020-3-7A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | CHT4020-3-7A | 80539 | SPS TECHNOLOGIES, LLC | | CHT4020-3-7A | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4020-3-7A | 17446 | HUCK INTERNATIONAL, INC | | HT4020-3-7A | 27624 | SPS TECHNOLOGIES LLC | | HT4020-3-7A | 56878 | SPS TECHNOLOGIES, LLC | | HT4020-3-7A | 73197 | HI-SHEAR CORPORATION | | HT4020-3-7A | 80539 | SPS TECHNOLOGIES, LLC | | HT4020-3-7A | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4020-3-7A | 97928 | HUCK INTL INC | | HT4020-3-7A | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION | | ST3M652C3-7A | 06710 | VALLEY-TODECO, INC. | | ST3M652C3-7A | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | ST3M652C3-7A | 1SVL7 | UDEC CORPORATION | | ST3M652C3-7A | 1VSL7 | HOUSTON PRECISION FASTENERS I LP | | ST3M652C3-7A | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | WC4020-3-7A | 60516 | WEST COAST AEROSPACE, INC. | | ST3M652C3-7A | 76301 | THE BOEING COMPANY | | ST3M652C3-7A | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4020-3-7A | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | THREAD QUANTITY PER INCH | 32 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.380 INCHES MINIMUM AND | | 0.447 INCHES MAXIMUM | | FASTENER LENGTH | 0.828 INCHES MINIMUM AND | | 0.875 INCHES MAXIMUM | | MATERIAL | STEEL COMP XM-13 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | HEAD STYLE | FLAT COUNTERSUNK UNDERCUT | | HEAD DIAMETER | 0.377 INCHES MINIMUM AND | | 0.381 INCHES MAXIMUM | | HEAD HEIGHT | 0.044 INCHES MINIMUM AND | | 0.046 INCHES MAXIMUM | | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 0.428 INCHES MINIMUM AND | | 0.448 INCHES MAXIMUM | | GRIP DIAMETER | 0.1890 INCHES MINIMUM AND | | 0.1895 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | 32.0 MICROINCHES THREADS | | SPECIAL FEATURES | FURNISHED WITH ONE O-RING |
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