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National Stock Number:
5306-01-090-9610
Federal Supply Class:
5306
National Item Identification Number:
010909610
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:
| LS5993-7D25 | 98897 | LOCKHEED MARTIN CORP | | STSBG001A07D025 | 06710 | VALLEY-TODECO, INC. | | STSBG001A07D025 | 06725 | SPS TECHNOLOGIES, LLC | | STSBG001A07D025 | 27624 | SPS TECHNOLOGIES LLC | | STSBG001A07D025 | 56878 | SPS TECHNOLOGIES, LLC | | STSBG001A07D025 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | STSBG001A07D025 | 98897 | LOCKHEED MARTIN CORP |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.438 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.469 INCHES MINIMUM AND | | 0.536 INCHES MAXIMUM | | FASTENER LENGTH | 2.041 INCHES MINIMUM AND | | 2.088 INCHES MAXIMUM | | MATERIAL | STEEL COMP H11 OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | MINIMUM TENSILE STRENGTH | 156000 POUNDS PER SQUARE INCH | | HEAD STYLE | DOUBLE HEXAGON | | HEAD HEIGHT | 0.247 INCHES MINIMUM AND | | 0.267 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.678 INCHES MINIMUM AND | | 0.689 INCHES MAXIMUM | | GRIP LENGTH | 1.552 INCHES MINIMUM AND | | 1.572 INCHES MAXIMUM | | GRIP DIAMETER | 0.4360 INCHES MINIMUM AND | | 0.4370 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.906 INCHES MINIMUM AND | | 1.958 INCHES MAXIMUM FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.096 INCHES MINIMUM AND | | 0.116 INCHES MAXIMUM FIRST HOLE |
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