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National Stock Number:
5306-01-351-3394
Federal Supply Class:
5306
National Item Identification Number:
013513394
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:
| MS21297H05014 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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Techincal Specification:
| EXTENDED WASHER DIAMETER | 0.575 INCHES MINIMUM AND 0.585 INCHES MAXIMUM | | EXTENDED WASHER THICKNESS | 0.035 INCHES MINIMUM AND 0.055 INCHES MAXIMUM | | FASTENER LENGTH | 1.527 INCHES MINIMUM AND 1.557 INCHES MAXIMUM | | GRIP DIAMETER | 0.311 INCHES MINIMUM AND 0.312 INCHES MAXIMUM | | GRIP LENGTH | 0.865 INCHES MINIMUM AND 0.885 INCHES MAXIMUM | | HEAD HEIGHT | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM | | HEAD MINOR DIAMETER | 0.360 INCHES MINIMUM AND 0.375 INCHES MAXIMUM | | HEAD STYLE | SPLINE EXTENDED WASHER | | MATERIAL | STEEL COMP H11 OVERALL | | NOMINAL THREAD DIAMETER | 0.313 INCHES | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.495 INCHES MINIMUM AND 0.589 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 24 |
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