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National Stock Number:
5306-01-388-2299
Federal Supply Class:
5306
National Item Identification Number:
013882299
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:
| 1864M10P01 | 07482 | GENERAL ELECTRIC COMPANY |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.680 INCHES NOMINAL | | FASTENER LENGTH | 1.180 INCHES MINIMUM AND | | 1.200 INCHES MAXIMUM | | MATERIAL | STEEL OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | C50TF13 CL-B CAGEC 07482 MFR REF SINGLE MATERIAL RESPONSE OVERALL | | HEAD STYLE | SQUARE | | HEAD HEIGHT | 0.115 INCHES MINIMUM AND | | 0.125 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.490 INCHES MINIMUM AND | | 0.510 INCHES MAXIMUM | | GRIP LENGTH | 0.500 INCHES MINIMUM AND | | 0.520 INCHES MAXIMUM | | GRIP DIAMETER | 0.2503 INCHES MINIMUM AND | | 0.2505 INCHES MAXIMUM | | SPECIAL FEATURES | CHAMFERED UNDESIDE HEAD 0.060 MIN,0.070 MAX IN. |
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