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National Stock Number:
5306-01-247-3702
Federal Supply Class:
5306
National Item Identification Number:
012473702
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:
| NAS1232C12 | 80205 | NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE |
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Techincal Specification:
| FASTENER LENGTH | 1.919 INCHES MINIMUM AND 1.949 INCHES MAXIMUM | | GRIP LENGTH | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM | | GRIP DIAMETER | 0.8735 INCHES MINIMUM AND 0.8740 INCHES MAXIMUM | | HEAD HEIGHT | 0.438 INCHES MINIMUM AND 0.453 INCHES MAXIMUM | | HEAD STYLE | UNDERCUT HEXAGON | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5732 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | IRON ALLOY 660 OVERALL | | MINIMUM TENSILE STRENGTH | 140000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.875 INCHES | | SPECIFICATION/STANDARD DATA | 80205-NAS1232 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD | | WIDTH BETWEEN FLATS | 1.239 INCHES MINIMUM AND 1.252 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | SURFACE FINISH | 63.0 MICROINCHES GRIP | | SURFACE FINISH | 63.0 MICROINCHES BEARING SURFACE OF HEAD | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 1.159 INCHES MINIMUM AND 1.209 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 14 | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |
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