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National Stock Number:
5306-01-436-4424
Federal Supply Class:
5306
National Item Identification Number:
014364424
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:
| BACB30TP3-8 | 06710 | VALLEY-TODECO, INC. | | BACB30TP3-8 | 06725 | SPS TECHNOLOGIES, LLC | | BACB30TP3-8 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30TP3-8 | 17943 | FEDERAL MANUFACTURING CORP | | BACB30TP3-8 | 1RC86 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30TP3-8 | 27624 | SPS TECHNOLOGIES LLC | | BACB30TP3-8 | 56878 | SPS TECHNOLOGIES, LLC | | BACB30TP3-8 | 81205 | THE BOEING COMPANY | | BACB30TP3-8 | 98524 | MONOGRAM AEROSPACE FASTENERS, INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.00 DEGREES MAXIMUM | | FASTENER LENGTH | 0.667 INCHES MINIMUM AND 0.697 INCHES MAXIMUM | | GRIP LENGTH | 0.490 INCHES MINIMUM AND 0.510 INCHES MAXIMUM | | GRIP DIAMETER | 0.1875 INCHES MINIMUM AND 0.1885 INCHES MAXIMUM | | HEAD DIAMETER | 0.337 INCHES MINIMUM AND 0.383 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | POINT STYLE | CONE | | THREAD LENGTH | 0.181 INCHES MINIMUM AND 0.184 INCHES MAXIMUM | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) | | THREAD QUANTITY PER INCH | 32 |
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