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National Stock Number:
5306-01-060-6843
Federal Supply Class:
5306
National Item Identification Number:
010606843
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:
| 120978-8D25N | 56878 | SPS TECHNOLOGIES, LLC | | 120978-8D25N | 80539 | SPS TECHNOLOGIES, LLC | | C7521-8DN25 | 06710 | VALLEY-TODECO, INC. | | AIC596-8DN25 | 06725 | SPS TECHNOLOGIES, LLC | | C7521-8DN25 | 56878 | SPS TECHNOLOGIES, LLC | | C7521-8DN25 | 81755 | LOCKHEED MARTIN CORPORATION | | VCG0009-8DN25 | 06710 | VALLEY-TODECO, INC. | | VS3133-8DN25 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | SF118-8DN25 | 0K6Z0 | SATURN FASTENERS INC | | H411-8DN25 | 17446 | HUCK INTERNATIONAL, INC | | PBF7521-8DN25 | 27624 | SPS TECHNOLOGIES LLC | | H411-8DN25 | 27970 | PANAMETRICS LLC | | VS3133-8DN25 | 70236 | TACTAIR FLUID CONTROLS INC | | C7521-8DN25 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | VS3133-8DN25 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| FASTENER LENGTH | 2.080 INCHES MINIMUM AND 2.100 INCHES MAXIMUM | | GRIP DIAMETER | 0.4982 INCHES MINIMUM AND 0.4991 INCHES MAXIMUM | | GRIP LENGTH | 1.552 INCHES MINIMUM AND 1.572 INCHES MAXIMUM | | HEAD HEIGHT | 0.281 INCHES NOMINAL | | HEAD STYLE | SPLINE DRIVE SHEAR HEAD | | MINIMUM TENSILE STRENGTH | 220000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.500 INCHES | | SPECIAL FEATURES | DRY FILM LUBE PER MIL-L-8937B ON BEARING SURFACE OF HEAD AND GRIP | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.528 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) | | THREAD QUANTITY PER INCH | 20 | | WIDTH BETWEEN FLATS | 0.901 INCHES MAXIMUM |
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