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National Stock Number:
5306-01-372-9402
Federal Supply Class:
5306
National Item Identification Number:
013729402
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:
| 989-2-3 | 82005 | ALLARD NAZARIAN GROUP, INC. |
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Techincal Specification:
| DISTANCE FROM CENTERLINE TO FLAT | 0.2970 INCHES MINIMUM AND 0.3075 INCHES MAXIMUM | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.563 INCHES MINIMUM AND 0.565 INCHES MAXIMUM FIRST HOLE | | FASTENER LENGTH | 1.812 INCHES NOMINAL | | GRIP LENGTH | 1.281 INCHES NOMINAL | | GRIP DIAMETER | 0.3106 INCHES MINIMUM AND 0.3115 INCHES MAXIMUM | | HEAD HEIGHT | 0.200 INCHES NOMINAL | | HEAD DIAMETER | 0.747 INCHES MINIMUM AND 0.749 INCHES MAXIMUM | | HEAD STYLE | DEE | | MATERIAL | STEEL COMP XM-12 OVERALL | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | SHANK UNTHREADED HOLE DIAMETER | 0.125 INCHES NOMINAL FIRST HOLE | | SPECIAL FEATURES | 0.062 IN. WIDE SLOT,0.531 IN. DEEP ON THREADED END | | SURFACE FINISH | 32.0 MICROINCHES HEAD16.0 MICROINCHES GRIP32.0 MICROINCHES THREADS | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 2A | | THREAD LENGTH | 0.531 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNC | | THREAD QUANTITY PER INCH | 18 |
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