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National Stock Number:
5305-00-357-1868
Federal Supply Class:
5305
National Item Identification Number:
003571868
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:
| 10125233 | A486G | NIMIKKEISTOKESKUS NCB FINLAND | | 10334608 | A486G | NIMIKKEISTOKESKUS NCB FINLAND | | HT4028L4-6 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4028L4-6 | 17446 | HUCK INTERNATIONAL, INC | | HT4028L4-6 | 56878 | SPS TECHNOLOGIES, LLC | | 11909V4L6-1 | 59563 | REID PRODUCTS INC. | | ST3M466V4L6-1 | 007R1 | TWIST TITE MFG, INC | | HT4028L4-6 | 73197 | HI-SHEAR CORPORATION | | ST3M466V4L6-1 | 76301 | THE BOEING COMPANY | | HT4028L4-6 | 80539 | SPS TECHNOLOGIES, LLC | | HT4028L4-6 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4028L4-6 | 97928 | HUCK INTL INC | | HT4028L4-6 | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION | | HT4028L4-6 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | WC4028L-4-6 | 60516 | WEST COAST AEROSPACE, INC. |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 0.829 INCHES MINIMUM AND 0.859 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM | | HEAD DIAMETER | 0.389 INCHES MINIMUM AND 0.394 INCHES MAXIMUM | | HEAD STYLE | OVAL COUNTERSUNK | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OVERALL OR AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | TITANIUM ALLOY OVERALL | | PROPRIETARY CHARACTERISTICS | PACS | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNF |
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