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National Stock Number:
5306-01-416-7218
Federal Supply Class:
5306
National Item Identification Number:
014167218
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:
| MS9723-05 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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Techincal Specification:
| EXTENDED WASHER DIAMETER | 0.375 INCHES NOMINAL | | EXTENDED WASHER THICKNESS | 0.040 INCHES MINIMUM | | FASTENER LENGTH | 0.731 INCHES NOMINAL | | GRIP LENGTH | 0.250 INCHES MINIMUM | | GRIP DIAMETER | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM | | HEAD HEIGHT | 0.258 INCHES NOMINAL | | HEAD STYLE | DOUBLE HEXAGON W/HOLE | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.409 INCHES MINIMUM AND 0.481 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) | | THREAD QUANTITY PER INCH | 32 | | WIDTH BETWEEN FLATS | 0.250 INCHES NOMINAL |
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