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National Stock Number:
5306-00-324-7712
Federal Supply Class:
5306
National Item Identification Number:
003247712
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:
| 74328-7H28 | 50392 | SPS TECHNOLOGIES INC | | 74328-7H28 | 56878 | SPS TECHNOLOGIES, LLC | | AIC752-7H28 | 06725 | SPS TECHNOLOGIES, LLC | | BM3326-7H28 | 17446 | HUCK INTERNATIONAL, INC | | 74328-7H28 | 80539 | SPS TECHNOLOGIES, LLC | | BM3326-7H28 | 97928 | HUCK INTL INC | | ST3M571-7H28 | 0K620 | SEQUENCE SUPPORT SERVICES INC | | ST3M571-7H28 | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | SLB253-7H28 | 16258 | SPACE-LOK, INC. | | GS1030-7H28 | 1EM77 | B & B SPECIALTIES INC | | S11-1059-7H28 | 57928 | SONIC INDUSTRIES, INC. | | MB84-7H28 | 73197 | HI-SHEAR CORPORATION | | S371-7H28 | 97928 | HUCK INTL INC | | MB84-7H28 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | VAL23033-7H28 | 06710 | VALLEY-TODECO, INC. | | VS3060-7H28 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | ST3M751-7H28 | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | ST3M571-7H28 | 27624 | SPS TECHNOLOGIES LLC | | ST3M751-7H28 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | STEM571-7H28 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | ST3M571-7H28 | 59563 | REID PRODUCTS INC. | | ST3M571-7H28 | 76301 | THE BOEING COMPANY | | VS3060-7H28 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| EXTENDED WASHER THICKNESS | 0.089 INCHES MINIMUM AND 0.109 INCHES MAXIMUM | | EXTENDED WASHER DIAMETER | 0.740 INCHES MINIMUM AND 0.750 INCHES MAXIMUM | | FASTENER LENGTH | 2.440 INCHES MINIMUM AND 2.470 INCHES MAXIMUM | | GRIP DIAMETER | 0.4365 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM | | GRIP LENGTH | 1.740 INCHES MINIMUM AND 1.760 INCHES MAXIMUM | | HEAD HEIGHT | 0.425 INCHES MINIMUM AND 0.445 INCHES MAXIMUM | | HEAD STYLE | DOUBLE HEXAGON W/HOLE | | HOLE CONFIGURATION STYLE | HEXAGON LONGITUDINAL HOLE | | HOLE DIAMETER | 0.055 INCHES NOMINAL | | HOLE QUANTITY | 4 | | HOLE TYPE | DRILLED | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | NOMINAL THREAD DIAMETER | 0.437 INCHES | | WIDTH BETWEEN FLATS | 0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 3A | | THREAD LENGTH | 0.680 INCHES MINIMUM AND 0.730 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 20 |
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