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National Stock Number:
5306-01-040-4711
Federal Supply Class:
5306
National Item Identification Number:
010404711
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:
| BACB30LJ6DU18 | 06710 | VALLEY-TODECO, INC. | | BACB30LJ6DU18 | 06725 | SPS TECHNOLOGIES, LLC | | BACB30LJ6DU18 | 16258 | SPACE-LOK, INC. | | BACB30LJ6DU18 | 17446 | HUCK INTERNATIONAL, INC | | BACB30LJ6DU18 | 17943 | FEDERAL MANUFACTURING CORP | | BACB30LJ6DU18 | 1RC86 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30LJ6DU18 | 27624 | SPS TECHNOLOGIES LLC | | BACB30LJ6DU18 | 56878 | SPS TECHNOLOGIES, LLC | | BACB30LJ6DU18 | 81205 | THE BOEING COMPANY | | BACB30LJ6DU18 | 97928 | HUCK INTL INC |
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.409 INCHES MINIMUM AND 1.459 INCHES MAXIMUM FIRST HOLE | | FASTENER LENGTH | 1.580 INCHES MINIMUM AND 1.610 INCHES MAXIMUM | | GRIP DIAMETER | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM | | GRIP LENGTH | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM | | HEAD HEIGHT | 0.188 INCHES MINIMUM AND 0.203 INCHES MAXIMUM | | HEAD STYLE | UNDERCUT HEXAGON | | MATERIAL | IRON ALLOY 660 OVERALL | | NOMINAL THREAD DIAMETER | 0.375 INCHES | | SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE | | WIDTH BETWEEN FLATS | 0.553 INCHES MINIMUM AND 0.564 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 | 0.445 INCHES MINIMUM AND 0.495 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 24 |
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