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National Stock Number:
5306-01-203-0902
Federal Supply Class:
5306
National Item Identification Number:
012030902
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:
| BACB30LJ4-9 | 06710 | VALLEY-TODECO, INC. | | BACB30LJ4-9 | 06725 | SPS TECHNOLOGIES, LLC | | BACB30LJ4-9 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30LJ4-9 | 0JV78 | J M PRECISION INC | | BACB30LJ4-9 | 17446 | HUCK INTERNATIONAL, INC | | BACB30LJ4-9 | 17943 | FEDERAL MANUFACTURING CORP | | BACB30LJ4-9 | 27624 | SPS TECHNOLOGIES LLC | | BACB30LJ4-9 | 50945 | MERCURY AEROSPACE FASTENERS INC | | BACB30LJ4-9 | 80539 | SPS TECHNOLOGIES, LLC | | BACB30LJ4-9 | 81205 | THE BOEING COMPANY | | BACB30LJ4-9 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30LJ4-9 | 97928 | HUCK INTL INC | | BACB30LJ4-9 | 98571 | TELEDYNE CONTROLS, LLC |
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Techincal Specification:
| FASTENER LENGTH | 0.936 INCHES MINIMUM AND 0.966 INCHES MAXIMUM | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM | | HEAD HEIGHT | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM | | HEAD STYLE | UNDERCUT HEXAGON | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | IRON ALLOY 660 OVERALL | | MINIMUM TENSILE STRENGTH | 95000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SPECIAL FEATURES | IDENTIFY WITH GREEN DYE OR PAINT ON THREAD END | | WIDTH BETWEEN FLATS | 0.430 INCHES MINIMUM AND 0.439 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 TY 2 CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.364 INCHES MINIMUM AND 0.414 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 28 |
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