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National Stock Number:
5306-01-539-1397
Federal Supply Class:
5306
National Item Identification Number:
015391397
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:
| BACB30LJ5-32X | 06725 | SPS TECHNOLOGIES, LLC | | BACB30LJ5-32X | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30LJ5-32X | 1RC86 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30LJ5-32X | 81205 | THE BOEING COMPANY | | BACB30NF5-32X | 81205 | THE BOEING COMPANY |
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Techincal Specification:
| FASTENER LENGTH | 1.814 INCHES MINIMUM AND 1.844 INCHES MAXIMUM | | GRIP DIAMETER | 0.3260 INCHES MINIMUM AND 0.3266 INCHES MAXIMUM | | GRIP LENGTH | 2.000 INCHES NOMINAL | | HEAD HEIGHT | 0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM | | HEAD STYLE | UNDERCUT HEXAGON | | PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT,CLOSE TOLERANCE | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | IRON ALLOY 660 OVERALL | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | SPECIAL FEATURES | 0.0156 OVERSIZE,RESTRICTED USAGE :REPAIR ONLY. | | WIDTH BETWEEN FLATS | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY2,CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.4543 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 24 | | THREAD SERIES DESIGNATOR | UNJF |
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