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National Stock Number:
5306-01-224-5972
Federal Supply Class:
5306
National Item Identification Number:
012245972
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:
| BACB30NE4-43 | 81205 | THE BOEING COMPANY | | BACB30NF4-43 | 06710 | VALLEY-TODECO, INC. | | BACB30NF4-43 | 06725 | SPS TECHNOLOGIES, LLC | | BACB30NF4-43 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30NF4-43 | 17446 | HUCK INTERNATIONAL, INC | | BACB30NF4-43 | 17943 | FEDERAL MANUFACTURING CORP | | BACB30NF4-43 | 1RC86 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30NF4-43 | 27624 | SPS TECHNOLOGIES LLC | | BACB30NF4-43 | 56878 | SPS TECHNOLOGIES, LLC | | NAS1304-43H | 80205 | NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE | | BACB30NF4-43 | 81205 | THE BOEING COMPANY |
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Techincal Specification:
| FASTENER LENGTH | 3.088 INCHES MINIMUM AND 3.138 INCHES MAXIMUM | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 2.678 INCHES MINIMUM AND 2.698 INCHES MAXIMUM | | HEAD HEIGHT | 0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM | | HEAD STYLE | DISHED HEXAGON | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OR AMS 6322 ASSN STD 2ND MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 4340 OR STEEL COMP 8740 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SPECIFICATION/STANDARD DATA | 80205-NAS6604 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD | | WIDTH BETWEEN FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416A,TY 2,CL 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 3A | | THREAD LENGTH | 0.410 INCHES MINIMUM AND 0.440 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 28 |
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