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National Stock Number:
5306-01-266-9207
Federal Supply Class:
5306
National Item Identification Number:
012669207
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:
| BACB30ST7-31 | 16258 | SPACE-LOK, INC. | | BACB30ST7-31 | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. | | BACB30ST7-31 | 56878 | SPS TECHNOLOGIES, LLC | | BACB30ST7-31 | 80539 | SPS TECHNOLOGIES, LLC | | BACB30ST7-31 | 81205 | THE BOEING COMPANY | | BACB30ST7-31 | 84256 | AVIBANK MFG., INC. | | BACB30ST7-31 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 2.258 INCHES MINIMUM AND 2.316 INCHES MAXIMUM FIRST HOLE | | FASTENER LENGTH | 2.801 INCHES MINIMUM AND 2.831 INCHES MAXIMUM | | GRIP DIAMETER | 0.4363 INCHES MINIMUM AND 0.4370 INCHES MAXIMUM | | GRIP LENGTH | 1.923 INCHES MINIMUM AND 1.953 INCHES MAXIMUM | | HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM FASTENER | | HEAD HEIGHT | 0.219 INCHES MINIMUM AND 0.234 INCHES MAXIMUM | | HEAD STYLE | DISHED HEXAGON | | MATERIAL | STEEL COMP E4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OR STEEL COMP 8735 OR STEEL COMP 6150 FASTENER | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.438 INCHES | | SPECIAL FEATURES | ASSEMBLY AREA EXTENDED AT THREADED END; 0.402 IN. MIN AND 0.412 IN. MAX LENGTH 0.369 IN. MIN AND 0.372 IN MAX DIA; ASSEMBLY CONTAINS RETAINER PAWL,MATT CRES PER AMS 5643,ROCKWELL HARDNESS 35.0 MIN AND 39.0 MAX; FINISH BLAST PER BAC 5951,PASSIVATE PER QQ-P-35,DRY FILM LUBE PER MIL-L-8937; SPRING MATT CRES PER AMS 5673,ROCKWELL HARDNESS 48.0 MIN,FINISH PASSIVATE PER QQ-P-35; PIN AND PLUG MATT 303 CRES PER ASTM A582,FINISH PASSIVATE PER QQ-P-35 | | SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE | | WIDTH BETWEEN FLATS | 0.679 INCHES MINIMUM AND 0.690 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | SURFACE FINISH | 63.0 MICROINCHES BEARING SURFACE OF HEAD | | SURFACE TREATMENT | CADMIUM AND CHROMATE FASTENER | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.466 INCHES MINIMUM AND 0.476 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 20 | | THREAD SERIES DESIGNATOR | UNJF |
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