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National Stock Number:
5306-00-286-0294
Federal Supply Class:
5306
National Item Identification Number:
002860294
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:
| 109453-4D15 | 56878 | SPS TECHNOLOGIES, LLC | | 109453-4D15 | 80539 | SPS TECHNOLOGIES, LLC | | AIC753-4D15 | 06725 | SPS TECHNOLOGIES, LLC | | BM17019-4D15 | 17446 | HUCK INTERNATIONAL, INC | | 11825-4D15 | 59563 | REID PRODUCTS INC. | | AIC753-4D15 | 6W912 | MEG TECHNOLOGIES, INC. | | HP5453-4D15 | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | S353-4D15 | 17446 | HUCK INTERNATIONAL, INC | | PBF1253-4D15 | 27624 | SPS TECHNOLOGIES LLC | | S11-1060-4D15 | 57928 | SONIC INDUSTRIES, INC. | | FIT7047-4D15 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | MB61-4D15 | 73197 | HI-SHEAR CORPORATION | | BM17019-4D15 | 97928 | HUCK INTL INC | | MB61-4D15 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | VAL23029-4D15 | 06710 | VALLEY-TODECO, INC. | | VS3204-4D15 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | ST3M453-4D15 | 0UCY9 | M.S. AEROSPACE INC. | | ST3M453-4D15 | 76301 | THE BOEING COMPANY | | VS3204-4D15 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | S353-4D15 | 97928 | HUCK INTL INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.371 INCHES MINIMUM AND | | 0.438 INCHES MAXIMUM | | FASTENER LENGTH | 1.319 INCHES MINIMUM AND | | 1.366 INCHES MAXIMUM | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH | | HEAD STYLE | DOUBLE HEXAGON | | HEAD HEIGHT | 0.154 INCHES MINIMUM AND | | 0.174 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.430 INCHES MINIMUM AND | | 0.439 INCHES MAXIMUM | | GRIP LENGTH | 0.928 INCHES MINIMUM AND | | 0.948 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.202 INCHES MINIMUM AND | | 1.259 INCHES MAXIMUM FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND | | 0.081 INCHES MAXIMUM FIRST HOLE |
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