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National Stock Number:
5306-01-040-8709
Federal Supply Class:
5306
National Item Identification Number:
010408709
Description:
BOLT,CLOSE TOLERANCE
Detail:
An externally threaded fastener whose unthreaded portion is of a specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a specific diameter for items one inch (25 mm) or less in diameter. Items over one inch (25 mm) in diameter shall have a tolerance of fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001) of an inch (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 not designed to be held or driven with an inserted driver, nor is it designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads. For items having close tolerance, and fabricated from material having 160,000 pounds per square inch (1100 megapascals) minimum tensile strength, see BOLT, SHEAR. For items fabricated from material having less than 160,000 pounds per square inch (1100 megapascals) minimum tensile strength and not having a close tolerance, see BOLT, MACHINE.
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Manufacturer Information:
| BACB30LJ7DU21 | 17446 | HUCK INTERNATIONAL, INC | | BACB30LJ7DU21 | 81205 | THE BOEING COMPANY | | BACB30LJ7DU21 | 97928 | HUCK INTL INC | | BACBN30LJ7DU21 | 06710 | VALLEY-TODECO, INC. | | BACBN30LJ7DU21 | 06725 | SPS TECHNOLOGIES, LLC | | BACBN30LJ7DU21 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACBN30LJ7DU21 | 17943 | FEDERAL MANUFACTURING CORP | | BACBN30LJ7DU21 | 27624 | SPS TECHNOLOGIES LLC | | BACBN30LJ7DU21 | 56878 | SPS TECHNOLOGIES, LLC | | BACBN30LJ7DU21 | 80539 | SPS TECHNOLOGIES, LLC | | BACBN30LJ7DU21 | 97928 | HUCK INTL INC | | BACBN30LJ7DU21 | 9N513 | VOI-SHAN/CHATSWORTH DIV OF VSI CORP SUB OF FAIRCHILD INDUSTRIES INC |
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.612 INCHES MINIMUM AND 1.662 INCHES MAXIMUM ALL HOLES | | FASTENER LENGTH | 1.838 INCHES MINIMUM AND 1.868 INCHES MAXIMUM | | GRIP DIAMETER | 0.4365 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM | | GRIP LENGTH | 1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM | | HEAD HEIGHT | 0.219 INCHES MINIMUM AND 0.234 INCHES MAXIMUM | | HEAD STYLE | UNDERCUT HEXAGON | | MATERIAL | IRON ALLOY 660 OVERALL | | NOMINAL THREAD DIAMETER | 0.438 INCHES | | SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE | | WIDTH BETWEEN FLATS | 0.679 INCHES MINIMUM AND 0.690 INCHES MAXIMUM | | SPECIFICATION/STANDARD DATA | 81205-BACB30LJ MANUFACTURERS STANDARD | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.516 INCHES MINIMUM AND 0.566 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 20 |
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