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National Stock Number:
5306-01-345-6551
Federal Supply Class:
5306
National Item Identification Number:
013456551
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:
| 2499355 | 99551 | GOODRICH CORPORATION |
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 6.190 INCHES MINIMUM FIRST HOLE AND 6.210 INCHES MAXIMUM FIRST HOLE | | FASTENER LENGTH | 6.890 INCHES MINIMUM AND 6.930 INCHES MAXIMUM | | GRIP DIAMETER | 1.9985 INCHES MINIMUM AND 1.9990 INCHES MAXIMUM | | GRIP LENGTH | 3.990 INCHES MINIMUM AND 4.010 INCHES MAXIMUM | | HEAD HEIGHT | 1.280 INCHES MINIMUM AND 1.300 INCHES MAXIMUM | | HEAD STYLE | HEXAGON | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6415 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 4340 OVERALL | | PROPRIETARY CHARACTERISTICS | PACS | | MINIMUM TENSILE STRENGTH | 140000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 2.000 INCHES | | SHANK UNTHREADED HOLE DIAMETER | 0.370 INCHES MINIMUM FIRST HOLE AND 0.380 INCHES MAXIMUM FIRST HOLE | | WIDTH BETWEEN FLATS | 2.900 INCHES MINIMUM AND 3.000 INCHES MAXIMUM | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-26074 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | NICKEL OVERALL | | THREAD CLASS | 2A | | THREAD DIRECTION | LEFT-HAND | | THREAD LENGTH | 2.900 INCHES MINIMUM AND 2.920 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 8 | | THREAD SERIES DESIGNATOR | UN |
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