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National Stock Number:
5306-01-418-5670
Federal Supply Class:
5306
National Item Identification Number:
014185670
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:
| S4928913-4-20 | 06725 | SPS TECHNOLOGIES, LLC | | S4928913-4-20 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | S4928913-4-20 | 17446 | HUCK INTERNATIONAL, INC | | S4928913-4-20 | 27624 | SPS TECHNOLOGIES LLC | | S4928913-4-20 | 50945 | MERCURY AEROSPACE FASTENERS INC | | S4928913-4-20 | 56787 | TAB ENGINEERING | | S4928913-4-20 | 88277 | THE BOEING COMPANY | | S4928913-4-20 | 97928 | HUCK INTL INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.316 INCHES NOMINAL | | FASTENER LENGTH | 1.551 INCHES MINIMUM AND | | 1.571 INCHES MAXIMUM | | MATERIAL | STEEL COMP 4340 OR | | STEEL COMP 8740 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5000 MIL SPEC 1ST MATERIAL RESPONSE OR | | MIL-S-6049 MIL SPEC 2ND MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CHROMIUM BEARING SURFACE OF HEAD | | CHROMIUM GRIP | | CADMIUM AND | | CHROMATE FASTENER | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TYPE 2, CLASS 3 FED SPEC ALL TREATMENT RESPONSES OVERALL | | QQ-C-320, TYPE 2, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD | | QQ-C-320, TYPE 2, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE GRIP | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | HEAD STYLE | HEXAGON | | HEAD HEIGHT | 0.125 INCHES MINIMUM AND | | 0.140 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 0.430 INCHES MINIMUM AND | | 0.439 INCHES MAXIMUM | | GRIP LENGTH | 1.240 INCHES MINIMUM AND | | 1.260 INCHES MAXIMUM | | GRIP DIAMETER | 0.2481 INCHES MINIMUM AND | | 0.2492 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | 32.0 MICROINCHES GRIP | | 32.0 MICROINCHES THREADS |
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