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National Stock Number:
5306-01-612-0544
Federal Supply Class:
5306
National Item Identification Number:
016120544
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:
| MS9724-03 | 0U583 | SAE INTERNATIONAL | | MS9724-03 | 81343 | SOCIETY OF AUTOMOTIVE ENGINEERS INC | | MS9724-03 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.502 INCHES MINIMUM AND | | 0.583 INCHES MAXIMUM | | FASTENER LENGTH | 0.700 INCHES NOMINAL | | MATERIAL | NICKEL ALLOY UNS N07001 OVERALL | | HEAD STYLE | DOUBLE HEXAGON EXTENDED WASHER | | HEAD HEIGHT | 0.303 INCHES NOMINAL | | WIDTH BETWEEN FLATS | 0.3125 INCHES NOMINAL | | EXTENDED WASHER DIAMETER | 0.438 INCHES NOMINAL | | EXTENDED WASHER THICKNESS | 0.60 INCHES MINIMUM | | GRIP LENGTH | 0.117 INCHES MINIMUM AND | | 0.198 INCHES MAXIMUM | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM |
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