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National Stock Number:
5306-01-442-8004
Federal Supply Class:
5306
National Item Identification Number:
014428004
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:
| 125570-1-24 | 56878 | SPS TECHNOLOGIES, LLC | | 125570-1-24 | 80539 | SPS TECHNOLOGIES, LLC | | AIC1829-1-24 | 06725 | SPS TECHNOLOGIES, LLC | | C20535-1-24 | 81755 | LOCKHEED MARTIN CORPORATION | | VS3616-1-24 | 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 | 0.838 INCHES NOMINAL | | FASTENER LENGTH | 2.353 INCHES NOMINAL | | MATERIAL | STEEL COMP H11 OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-8837 TYPE II, CLASS 2 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | HARDNESS RATING | 46.0 ROCKWELL C MINIMUM AND | | 50.0 ROCKWELL C MAXIMUM OVERALL | | MINIMUM TENSILE STRENGTH | 37800 POUNDS PER SQUARE INCH | | HEAD STYLE | SPLINE EXTENDED WASHER | | HEAD HEIGHT | 0.450 INCHES NOMINAL | | EXTENDED WASHER DIAMETER | 0.922 INCHES MINIMUM AND | | 0.932 INCHES MAXIMUM | | EXTENDED WASHER THICKNESS | 0.062 INCHES MINIMUM AND | | 0.082 INCHES MAXIMUM | | HEAD MINOR DIAMETER | 0.547 INCHES MINIMUM AND | | 0.562 INCHES MAXIMUM | | HOLE DIAMETER | 0.350 INCHES MINIMUM AND | | 0.390 INCHES MAXIMUM | | GRIP LENGTH | 1.500 INCHES NOMINAL | | GRIP DIAMETER | 0.4785 INCHES MINIMUM AND | | 0.4995 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES OVERALL | | POINT STYLE | FLAT | | SPECIFICATION/STANDARD DATA | 81755-C20535 MANUFACTURERS SPECIFICATION CONTROL |
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