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National Stock Number:
5306-01-125-5043
Federal Supply Class:
5306
National Item Identification Number:
011255043
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:
| 3M261-4-9 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | 3M261-4-9 | 0PTK6 | SPS TECHNOLOGIES INC | | AIC261M-4-9 | 06725 | SPS TECHNOLOGIES, LLC | | 66051-4-9 | 56878 | SPS TECHNOLOGIES, LLC | | 3M261-4-9 | 76301 | THE BOEING COMPANY | | 66051-4-9 | 80539 | SPS TECHNOLOGIES, LLC | | HS2601-4-Z-9 | 17446 | HUCK INTERNATIONAL, INC | | VS2938-4-9 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HS2601-4-Z-9 | 97928 | HUCK INTL INC | | VS2938-4-9 | C4293 | ALCOA FASTENING SYSTEMS FAIRCHILDFASTENERS EUROPE - VSD GMBH |
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Techincal Specification:
| FASTENER LENGTH | 0.959 INCHES NOMINAL | | GRIP LENGTH | 0.802 INCHES MINIMUM AND 0.822 INCHES MAXIMUM | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | HEAD HEIGHT | 0.154 INCHES MINIMUM AND 0.174 INCHES MAXIMUM | | HEAD STYLE | DOUBLE HEXAGON | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | IRON ALLOY 660 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SPECIFICATION/STANDARD DATA | 76301-3-261 MANUFACTURERS STANDARD | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MAC P.S.13145 MFR REF SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | THREAD CLASS | 3A | | THREAD LENGTH | 0.397 INCHES NOMINAL | | THREAD DIRECTION | RIGHT-HAND | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNJF | | WIDTH BETWEEN FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM |
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