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National Stock Number:
5306-00-370-7830
Federal Supply Class:
5306
National Item Identification Number:
003707830
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:
| 451840 | 17772 | AERO ENGINEERING & MANUFACTURING COMPANY OF CALIFORNIA, LLC | | 451840 | 30205 | MERCER PRODUCTS & MANUFACTURING COMPANY | | 451840 | 98897 | LOCKHEED MARTIN CORP |
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Techincal Specification:
| FASTENER LENGTH | 4.960 INCHES NOMINAL | | HEAD HEIGHT | 0.188 INCHES NOMINAL | | MINIMUM TENSILE STRENGTH | 200000 POUNDS PER SQUARE INCH | | SHANK UNTHREADED HOLE DIAMETER | 0.104 INCHES MINIMUM AND 0.109 INCHES MAXIMUM FIRST HOLE | | SPECIAL FEATURES | UNDERCUTS BETWEEN HEAD AND SHOULDER AND SHOULDER AND THREADS 0.540 IN. DIA. BY 0.063 IN. WIDE | | WIDTH BETWEEN FLATS | 0.938 INCHES NOMINAL | | SURFACE TREATMENT | CHROMIUM OVERALL | | THREAD CLASS | 3A | | THREAD LENGTH | 0.375 INCHES MINIMUM |
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