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National Stock Number:
5306-01-323-3340
Federal Supply Class:
5306
National Item Identification Number:
013233340
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:
| 4076817 | 52661 | RTX CORPORATION | | 4076817 | 77445 | RTX CORPORATION | | 5306PL0894782 | 9009H | INSPEKTORAT WSPARCIA SIL ZBROJNYCH |
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Techincal Specification:
| CHAMFER ANGLE | 44.0 DEGREES MINIMUM AND 46.0 DEGREES MAXIMUM | | FASTENER LENGTH | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM | | GRIP LENGTH | 0.435 INCHES MINIMUM AND 0.515 INCHES MAXIMUM | | GRIP DIAMETER | 0.2488 INCHES MINIMUM AND 0.2493 INCHES MAXIMUM | | HEAD LENGTH | 0.480 INCHES MINIMUM AND 0.500 INCHES MAXIMUM | | HEAD HEIGHT | 0.090 INCHES MINIMUM AND 0.110 INCHES MAXIMUM | | HEAD STYLE | TEE NO. 6 | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SPECIAL FEATURES | THREAD MODIFIED MAJOR DIA 0.2410/0.2470 IN. | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.525 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) | | THREAD QUANTITY PER INCH | 28 | | WIDTH BETWEEN FLATS | 0.375 INCHES NOMINAL |
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