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National Stock Number:
5306-00-127-3439
Federal Supply Class:
5306
National Item Identification Number:
001273439
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:
| 79784-8-2 | 56878 | SPS TECHNOLOGIES, LLC | | A02DS214 | 77272 | THE BOEING COMPANY | | A02DS214-2 | 77272 | THE BOEING COMPANY | | A02DS2142-2 | 77272 | THE BOEING COMPANY | | BM214-2 | 17446 | HUCK INTERNATIONAL, INC |
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Techincal Specification:
| EXTENDED WASHER THICKNESS | 0.113 INCHES MINIMUM AND 0.133 INCHES MAXIMUM | | EXTENDED WASHER DIAMETER | 0.823 INCHES NOMINAL | | FASTENER LENGTH | 2.692 INCHES MINIMUM AND 2.722 INCHES MAXIMUM | | GRIP DIAMETER | 0.4985 INCHES MINIMUM AND 0.4995 INCHES MAXIMUM | | GRIP LENGTH | 0.750 INCHES NOMINAL | | HEAD HEIGHT | 0.494 INCHES MINIMUM AND 0.514 INCHES MAXIMUM | | HEAD STYLE | DOUBLE HEXAGON W/HOLE | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OVERALL OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP E4340 OVERALL OR STEEL COMP 8740 OVERALL | | PROPRIETARY CHARACTERISTICS | PACS | | NOMINAL THREAD DIAMETER | 0.500 INCHES | | SPECIAL FEATURES | SOURCE CONTROL REFERENCE NUMBER IS 77272 A02DS214 | | WIDTH BETWEEN FLATS | 0.553 INCHES MINIMUM AND 0.564 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES TOP OF HEAD | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | NAS672 ASSN STD 1ST TREATMENT RESPONSE OVERALL OR BPS-F-69 FSCM 77272 MFR REF 2ND TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL OR CADMIUM OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.976 INCHES MINIMUM AND 1.006 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNJF |
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