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National Stock Number:
5306-01-067-3398
Federal Supply Class:
5306
National Item Identification Number:
010673398
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:
| 109453-4D23 | 56878 | SPS TECHNOLOGIES, LLC | | 109453-4D23 | 80539 | SPS TECHNOLOGIES, LLC | | AIC753-4D23 | 06725 | SPS TECHNOLOGIES, LLC | | BM17019-4D23 | 17446 | HUCK INTERNATIONAL, INC | | 11825-4D23 | 59563 | REID PRODUCTS INC. | | BM17019-4D23 | 97928 | HUCK INTL INC | | S353-4D23 | 17446 | HUCK INTERNATIONAL, INC | | ST3M453-4D23 | 27624 | SPS TECHNOLOGIES LLC | | ST3M453-4D23 | 56878 | SPS TECHNOLOGIES, LLC | | ST3M453-4D23 | 57928 | SONIC INDUSTRIES, INC. | | ST3M453-4D23 | 58845 | ABOUNDING SECURITY INC DIV OF MAA CORP | | ST3M453-4D23 | 59764 | KENALOY PRODUCTS INC SUB MASCO CORP | | MB61-4D23 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | S353-4D23 | 97928 | HUCK INTL INC | | VAL23029-4D23 | 06710 | VALLEY-TODECO, INC. | | ST3M453-4D23 | 73197 | HI-SHEAR CORPORATION | | ST3M453-4D23 | 76301 | THE BOEING COMPANY | | US3204-4D23 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | ST3M453-4D23 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS 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 | 1.819 INCHES MINIMUM AND | | 1.866 INCHES MAXIMUM | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | 23M112 TY B FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL | | 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 | 1.428 INCHES MINIMUM AND | | 1.448 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.698 INCHES MINIMUM AND | | 1.755 INCHES MAXIMUM FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND | | 0.081 INCHES MAXIMUM FIRST HOLE | | THE MANUFACTURERS DATA | | | MANUFACTURERS CODE | 17446 | | DESIGN CONTROL REFERENCE | BM17019-4D23 |
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