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National Stock Number:
5306-00-332-4500
Federal Supply Class:
5306
National Item Identification Number:
003324500
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:
| 74328-6-18 | 56878 | SPS TECHNOLOGIES, LLC | | 79328-6-18 | 50392 | SPS TECHNOLOGIES INC | | AIC752-6-18 | 06725 | SPS TECHNOLOGIES, LLC | | 79328-6-18 | 56878 | SPS TECHNOLOGIES, LLC | | MB84-6-18 | 73197 | HI-SHEAR CORPORATION | | BM3326-6-18 | 97928 | HUCK INTL INC | | VAL23033-6-18 | 06710 | VALLEY-TODECO, INC. | | VS3060-6-18 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | S371-6-18 | 17446 | HUCK INTERNATIONAL, INC | | ST3M571-6-18 | 27624 | SPS TECHNOLOGIES LLC | | S11-1059-6-18 | 57928 | SONIC INDUSTRIES, INC. | | ST3M571-6-18 | 76301 | THE BOEING COMPANY | | S371-6-18 | 97928 | HUCK INTL INC | | MB84-6-18 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | VS3060-6-18 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| EXTENDED WASHER THICKNESS | 0.081 INCHES MINIMUM AND 0.101 INCHES MAXIMUM | | EXTENDED WASHER DIAMETER | 0.639 INCHES MINIMUM AND 0.649 INCHES MAXIMUM | | FASTENER LENGTH | 1.724 INCHES MINIMUM AND 1.754 INCHES MAXIMUM | | GRIP LENGTH | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM | | GRIP DIAMETER | 0.3740 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM | | HEAD HEIGHT | 0.378 INCHES MINIMUM AND 0.398 INCHES MAXIMUM | | HEAD STYLE | DOUBLE HEXAGON W/HOLE | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | NOMINAL THREAD DIAMETER | 0.375 INCHES | | WIDTH BETWEEN FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 3A | | THREAD LENGTH | 0.589 INCHES MINIMUM AND 0.639 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 24 |
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