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National Stock Number:
5306-01-077-9919
Federal Supply Class:
5306
National Item Identification Number:
010779919
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:
| 121933-4-18 | 56878 | SPS TECHNOLOGIES, LLC | | ST3M750-4-18 | 06710 | VALLEY-TODECO, INC. | | ST3M750-4-18 | 06725 | SPS TECHNOLOGIES, LLC | | ST3M750-4-18 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | ST3M750-4-18 | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | ST3M750-4-18 | 16258 | SPACE-LOK, INC. | | ST3M750-4-18 | 17446 | HUCK INTERNATIONAL, INC | | ST3M750-4-18 | 1EM77 | B & B SPECIALTIES INC | | ST3M750-4-18 | 1VSL7 | HOUSTON PRECISION FASTENERS I LP | | ST3M750-4-18 | 27624 | SPS TECHNOLOGIES LLC | | ST3M750-4-18 | 56878 | SPS TECHNOLOGIES, LLC | | ST3M750-4-18 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | ST3M750-4-18 | 59563 | REID PRODUCTS INC. | | ST3M750-4-18 | 60516 | WEST COAST AEROSPACE, INC. | | ST3M750-4-18 | 76301 | THE BOEING COMPANY | | ST3M750-4-18 | 80539 | SPS TECHNOLOGIES, LLC | | ST3M750-4-18 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.355 INCHES MINIMUM AND 1.375 INCHES MAXIMUM ALL HOLES | | FASTENER LENGTH | 1.473 INCHES MINIMUM AND 1.493 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM | | HEAD HEIGHT | 0.164 INCHES NOMINAL | | HEAD STYLE | DOUBLE HEXAGON | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | WIDTH BETWEEN FLATS | 0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 3A | | THREAD LENGTH | 0.358 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNF |
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