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National Stock Number:
5306-00-479-0260
Federal Supply Class:
5306
National Item Identification Number:
004790260
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:
| 11797A04U012 | 59563 | REID PRODUCTS INC. | | 68484-4A012 | 56878 | SPS TECHNOLOGIES, LLC | | AIC2263A04U012 | 06725 | SPS TECHNOLOGIES, LLC | | BM3200-4A012 | 17446 | HUCK INTERNATIONAL, INC | | 68484-4A12 | 56878 | SPS TECHNOLOGIES, LLC | | 68484-4A12 | 80539 | SPS TECHNOLOGIES, LLC | | VAL23611-4D012 | 06710 | VALLEY-TODECO, INC. | | VS2978A04U012 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | PBF1041A4U012 | 27624 | SPS TECHNOLOGIES LLC | | STSBG000A04U012 | 56878 | SPS TECHNOLOGIES, LLC | | STSBG000A04U012 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | VS2978A04U012 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BM3200-4A012 | 97928 | HUCK INTL INC | | STSBG000A04U012 | 98897 | LOCKHEED MARTIN CORP |
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Techincal Specification:
| FASTENER LENGTH | 1.027 INCHES MINIMUM AND 1.074 INCHES MAXIMUM | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 0.740 INCHES MINIMUM AND 0.760 INCHES MAXIMUM | | HEAD HEIGHT | 0.164 INCHES NOMINAL | | HEAD STYLE | DOUBLE HEXAGON | | MATERIAL | STEEL COMP H11 OVERALL | | MINIMUM TENSILE STRENGTH | 132000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | 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 TREATMENT DOCUMENT AND CLASSIFICATION | STSBS000 FSCM 98897 MFR REF SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | NICKEL AND CADMIUM AND CHROMATE OVERALL | | THREAD CLASS | 3A | | THREAD LENGTH | 0.267 INCHES MINIMUM AND 0.334 INCHES MAXIMUM | | THREAD DIRECTION | RIGHT-HAND | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNJF |
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