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National Stock Number:
5306-01-539-1324
Federal Supply Class:
5306
National Item Identification Number:
015391324
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:
| ST3M735C4-44 | 76301 | THE BOEING COMPANY |
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Techincal Specification:
| FASTENER LENGTH | 3.178 INCHES MAXIMUM | | GRIP DIAMETER | 0.2483 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM | | GRIP LENGTH | 2.750 INCHES NOMINAL | | HEAD HEIGHT | 0.095 INCHES MINIMUM AND 0.110 INCHES MAXIMUM | | HEAD STYLE | HEXAGON | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE FASTENER | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5643,17-4PH ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5673, 17-7PH ASSN STD SINGLE MATERIAL RESPONSE RING | | MATERIAL | IRON ALLOY 660 FASTENER | | MATERIAL | STEEL COMP 630 RING | | MINIMUM TENSILE STRENGTH | 4680 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | WIDTH BETWEEN FLATS | 0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.308 INCHES MINIMUM AND 0.323 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNJF |
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