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National Stock Number:
5306-01-306-9591
Federal Supply Class:
5306
National Item Identification Number:
013069591
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:
| 121673-4-10 | 80539 | SPS TECHNOLOGIES, LLC | | ST3M735-4-10 | 76301 | THE BOEING COMPANY |
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.979 INCHES NOMINAL FIRST HOLE | | FASTENER LENGTH | 1.043 INCHES MINIMUM AND 1.063 INCHES MAXIMUM | | GRIP DIAMETER | 0.249 INCHES NOMINAL | | GRIP LENGTH | 0.625 INCHES MINIMUM AND 0.641 INCHES MAXIMUM | | HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 41.0 ROCKWELL C MAXIMUM OVERALL | | HEAD HEIGHT | 0.126 INCHES MINIMUM AND 0.141 INCHES MAXIMUM | | HEAD STYLE | HEXAGON | | HOLE CONFIGURATION STYLE | HEXAGON CORNERS | | HOLE DIAMETER | 0.045 INCHES MINIMUM AND 0.055 INCHES MAXIMUM | | HOLE QUANTITY | 3 | | HOLE TYPE | DRILLED | | LOCKING FEATURE | SLOTTED RING | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5643 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5673 ASSN STD SINGLE MATERIAL RESPONSE RING | | MATERIAL | STEEL COMP 630 OR STEEL COMP 631 RING | | MATERIAL | STEEL OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE | | WIDTH BETWEEN FLATS | 0.434 INCHES NOMINAL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE RING | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2,CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | SURFACE TREATMENT | PASSIVATE RING | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.105 INCHES MINIMUM AND 0.120 INCHES MAXIMUM | | THREAD CLASS | 3A | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 28 |
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