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National Stock Number:
5305-01-241-0755
Federal Supply Class:
5305
National Item Identification Number:
012410755
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:
| 11931-6L8 | 59563 | REID PRODUCTS INC. | | CHT4057-6-8 | 17419 | DEUTSCH CO THE | | HT4057-6-8 | 73197 | HI-SHEAR CORPORATION | | HT4057-6-78 | 80539 | SPS TECHNOLOGIES, LLC | | HT4057-6-8 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4057-6-8 | 97928 | HUCK INTL INC | | HT4057-6L8A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4057-6-8A | 0PTK6 | SPS TECHNOLOGIES INC | | HT4057-6-8A | 17446 | HUCK INTERNATIONAL, INC | | HT4057-6-8A | 73197 | HI-SHEAR CORPORATION | | HT4057-6-8A | 80539 | SPS TECHNOLOGIES, LLC | | HT4057-6-8A | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4057-6-8A | 97928 | HUCK INTL INC | | HT4057-6-8A | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | HT4057-6L8A | 56878 | SPS TECHNOLOGIES, LLC | | ST3M733-6L8 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | WC4057-6-8 | 60516 | WEST COAST AEROSPACE, INC. | | WC5057-6-8 | 60516 | WEST COAST AEROSPACE, INC. | | ST3M733-6-8 | 76301 | THE BOEING COMPANY | | ST3M733-6L8 | 76301 | THE BOEING COMPANY | | HT4057-6L8A | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 1.126 INCHES MINIMUM AND 1.156 INCHES MAXIMUM | | GRIP LENGTH | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM | | GRIP DIAMETER | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM | | HEAD DIAMETER | 0.692 INCHES MINIMUM AND 0.763 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP XM-13 OVERALL | | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.375 INCHES | | SPECIAL FEATURES | WITH CETYL ALCOHOL PER MIL-L-87132 TYPE 1 GR B | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-83488 TYPE 2 CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | ALUMINUM AND CHROMATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.616 INCHES MINIMUM AND 0.666 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 24 | | THREAD SERIES DESIGNATOR | UNJF |
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