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National Stock Number:
5306-01-621-8418
Federal Supply Class:
5306
National Item Identification Number:
016218418
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:
| BACB30UU24-64 | 56878 | SPS TECHNOLOGIES, LLC | | BACB30UU24-64 | 81205 | THE BOEING COMPANY |
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Techincal Specification:
| MATERIAL | NICKEL ALLOY 718 OVERALL | | PROPRIETARY CHARACTERISTICS | PACS | | NOMINAL THREAD DIAMETER | 1.500 INCHES | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 1.275 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 12 | | THREAD SERIES DESIGNATOR | UNJF | | FASTENER LENGTH | 5.275 INCHES NOMINAL | | GRIP DIAMETER | 1.5136 INCHES NOMINAL | | GRIP LENGTH | 4.000 INCHES NOMINAL | | HEAD HEIGHT | 0.810 INCHES MINIMUM AND 0.830 INCHES MAXIMUM | | HEAD MINOR DIAMETER | 2.176 INCHES MINIMUM AND 2.190 INCHES MAXIMUM | | HEAD STYLE | SPLINE DRIVE SHEAR HEAD |
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