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National Stock Number:
5306-01-624-8689
Federal Supply Class:
5306
National Item Identification Number:
016248689
Description:
BOLT,SHEAR
Detail:
A high strength, 160,000 pounds per square inch (1100 megapascals) minimum tensile strength externally threaded fastener designed for use in applications involving great shear stress. The head is designed to accommodate an external wrench or driver. 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. The unthreaded portion is of specific 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. A locking feature may be incorporated in the design of the head or threads. See BOLT, MACHINE and BOLT, CLEVIS.
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Manufacturer Information:
| ST3M571-4D13 | 06710 | VALLEY-TODECO, INC. | | ST3M571-4D13 | 06725 | SPS TECHNOLOGIES, LLC | | ST3M571-4D13 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | ST3M571-4D13 | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | ST3M571-4D13 | 17446 | HUCK INTERNATIONAL, INC | | ST3M571-4D13 | 27624 | SPS TECHNOLOGIES LLC | | ST3M571-4D13 | 56878 | SPS TECHNOLOGIES, LLC | | ST3M571-4D13 | 57928 | SONIC INDUSTRIES, INC. | | ST3M571-4D13 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | ST3M571-4D13 | 73197 | HI-SHEAR CORPORATION | | ST3M571-4D13 | 76301 | THE BOEING COMPANY |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.2500 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.468 INCHES NOMINAL | | FASTENER LENGTH | 1.2805 INCHES NOMINAL | | MATERIAL | STEEL COMP XM-13 OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | MINIMUM TENSILE STRENGTH | 220000 POUNDS PER SQUARE INCH | | HEAD STYLE | DOUBLE HEXAGON W/HOLE | | HEAD HEIGHT | 0.300 INCHES NOMINAL | | WIDTH BETWEEN FLATS | 0.348 INCHES NOMINAL | | EXTENDED WASHER DIAMETER | 0.433 INCHES NOMINAL | | EXTENDED WASHER THICKNESS | 0.069 INCHES NOMINAL | | GRIP LENGTH | 0.8125 INCHES NOMINAL | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.0885 INCHES MINIMUM AND | | 1.0985 INCHES MAXIMUM FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND | | 0.081 INCHES MAXIMUM FIRST HOLE | | PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT-CLOSE TOLERANCE, 12 POINT, FLANGE HEAD, 220 KSI FTU, CRES |
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