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National Stock Number:
5306-01-435-8735
Federal Supply Class:
5306
National Item Identification Number:
014358735
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:
| BACB30NE5-56 | 06710 | VALLEY-TODECO, INC. | | BACB30NE5-56 | 06725 | SPS TECHNOLOGIES, LLC | | BACB30NE5-56 | 17446 | HUCK INTERNATIONAL, INC | | BACB30NE5-56 | 17943 | FEDERAL MANUFACTURING CORP | | BACB30NE5-56 | 27624 | SPS TECHNOLOGIES LLC | | BACB30NE5-56 | 56878 | SPS TECHNOLOGIES, LLC | | BACB30NE5-56 | 80539 | SPS TECHNOLOGIES, LLC | | BACB30NE5-56 | 81205 | THE BOEING COMPANY | | BACB30NE5-56 | 97928 | HUCK INTL INC | | BACB30NE5-56 | 9N513 | VOI-SHAN/CHATSWORTH DIV OF VSI CORP SUB OF FAIRCHILD INDUSTRIES INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.3125 INCHES | | THREAD QUANTITY PER INCH | 24 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.469 INCHES NOMINAL | | FASTENER LENGTH | 3.954 INCHES MINIMUM AND | | 3.984 INCHES MAXIMUM | | MATERIAL | STEEL COMP E4340 OR | | STEEL COMP 8740 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR | | MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR | | AMS 6322 ASSN STD 2ND MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND | | CHROMATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TYPE 2, CLASS 2 FED SPEC ALL TREATMENT RESPONSES OVERALL | | HEAD STYLE | DISHED HEXAGON | | HEAD HEIGHT | 0.156 INCHES MINIMUM AND | | 0.171 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.492 INCHES MINIMUM AND | | 0.502 INCHES MAXIMUM | | GRIP LENGTH | 3.490 INCHES MINIMUM AND | | 3.510 INCHES MAXIMUM | | GRIP DIAMETER | 0.3110 INCHES MINIMUM AND | | 0.3120 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | 32.0 MICROINCHES GRIP | | 32.0 MICROINCHES THREADS |
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