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National Stock Number:
5306-01-254-4366
Federal Supply Class:
5306
National Item Identification Number:
012544366
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:
| 109453-8D21 | 56878 | SPS TECHNOLOGIES, LLC | | 11825-8D21 | 59563 | REID PRODUCTS INC. | | AIC753-8D21 | 06725 | SPS TECHNOLOGIES, LLC | | BM17019-8D21 | 17446 | HUCK INTERNATIONAL, INC | | GS1016-8D21 | 1EM77 | B & B SPECIALTIES INC | | BM17019-8D21 | 97928 | HUCK INTL INC | | S353-8D21 | 17446 | HUCK INTERNATIONAL, INC | | PBF1253-8D21 | 27624 | SPS TECHNOLOGIES LLC | | S11-1060-8D21 | 57928 | SONIC INDUSTRIES, INC. | | MA5453-8D21 | 58845 | ABOUNDING SECURITY INC DIV OF MAA CORP | | KS3020-8D21 | 59764 | KENALOY PRODUCTS INC SUB MASCO CORP | | MB61-8D21 | 73197 | HI-SHEAR CORPORATION | | S353-8D21 | 97928 | HUCK INTL INC | | MB61-8D21 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | VAL23029-8D21 | 06710 | VALLEY-TODECO, INC. | | VS3204-8D21 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | ST3M453-8D21 | 0UCY9 | M.S. AEROSPACE INC. | | ST3M453-8D21 | 58845 | ABOUNDING SECURITY INC DIV OF MAA CORP | | ST3M453-8D21 | 59764 | KENALOY PRODUCTS INC SUB MASCO CORP | | ST3M453-8D21 | 76301 | THE BOEING COMPANY | | ST3M453-8D21 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | VS3204-8D21 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.500 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.623 INCHES MINIMUM AND | | 0.690 INCHES MAXIMUM | | FASTENER LENGTH | 1.945 INCHES MINIMUM AND | | 1.992 INCHES MAXIMUM | | MATERIAL | STEEL COMP XM-13 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH | | HEAD STYLE | DOUBLE HEXAGON | | HEAD HEIGHT | 0.271 INCHES MINIMUM AND | | 0.291 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.752 INCHES MAXIMUM | | GRIP LENGTH | 1.302 INCHES MINIMUM AND | | 1.322 INCHES MAXIMUM | | GRIP DIAMETER | 0.4990 INCHES MINIMUM AND | | 0.4995 INCHES MAXIMUM | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.817 INCHES MINIMUM AND | | 1.874 INCHES MAXIMUM FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES MINIMUM AND | | 0.111 INCHES MAXIMUM FIRST HOLE |
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