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National Stock Number:
5306-00-425-2657
Federal Supply Class:
5306
National Item Identification Number:
004252657
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:
| 11701A04D028 | 59563 | REID PRODUCTS INC. | | 68485-4-028 | 56878 | SPS TECHNOLOGIES, LLC | | AIC2264A04D028 | 06725 | SPS TECHNOLOGIES, LLC | | BM3210-4A028D | 17446 | HUCK INTERNATIONAL, INC | | 68485-4-028 | 80539 | SPS TECHNOLOGIES, LLC | | BM3210-4A028D | 97928 | HUCK INTL INC | | STSBG001A04D028 | 1CNU4 | JOHN HASSALL LLC | | STSBG001A04D028 | 1EM77 | B & B SPECIALTIES INC | | PBF1042A4D028 | 27624 | SPS TECHNOLOGIES LLC | | STSBG001A04D028 | 4GP55 | ACUFAST AIRCRAFT PRODUCTS | | STSBG001A04D028 | 56878 | SPS TECHNOLOGIES, LLC | | STSBG001A04D028 | 57928 | SONIC INDUSTRIES, INC. | | STSBG001A04D028 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | STSBG001A04D028 | 98897 | LOCKHEED MARTIN CORP | | VAL23602-4DS028 | 06710 | VALLEY-TODECO, INC. | | VS2979A04D028 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | VS2979A04D028 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| THREAD CLASS | 3A | | THREAD LENGTH | 0.277 INCHES MINIMUM AND | | 0.324 INCHES MAXIMUM | | FASTENER LENGTH | 2.027 INCHES MINIMUM AND | | 2.074 INCHES MAXIMUM | | MATERIAL | STEEL COMP H11 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | NICKEL AND | | CADMIUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS 2416 ASSN STD ALL TREATMENT RESPONSES OVERALL | | MINIMUM TENSILE STRENGTH | 156000 POUNDS PER SQUARE INCH | | HEAD HEIGHT | 0.164 INCHES NOMINAL | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | 32.0 MICROINCHES GRIP | | SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES NOMINAL FIRST HOLE | | THE MANUFACTURERS DATA | | | MANUFACTURERS CODE | 80539 | | DESIGN CONTROL REFERENCE | 68485-4-028 |
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