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National Stock Number:
5306-01-394-7863
Federal Supply Class:
5306
National Item Identification Number:
013947863
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:
| MS27576-12-60 | 80205 | NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE | | MS27576-12-60 | 96906 | MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M |
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Techincal Specification:
| SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TY2, CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND | | 41.0 ROCKWELL C MAXIMUM FASTENER | | MINIMUM TENSILE STRENGTH | 95000 POUNDS PER SQUARE INCH | | HEAD STYLE | CROWNED HEXAGON | | HEAD HEIGHT | 0.376 INCHES MINIMUM AND | | 0.391 INCHES MAXIMUM | | WIDTH BETWEEN FLATS | 1.052 INCHES MINIMUM AND | | 1.064 INCHES MAXIMUM | | LOCKING FEATURE | RETAINER FASTENER | | GRIP LENGTH | 4.762 INCHES MINIMUM AND | | 4.782 INCHES MAXIMUM | | GRIP DIAMETER | 0.7482 INCHES MINIMUM AND | | 0.7491 INCHES MAXIMUM | | SURFACE FINISH | 63.0 MICROINCHES BEARING SURFACE OF HEAD | | 63.0 MICROINCHES GRIP | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 4.615 INCHES MINIMUM AND | | 4.733 INCHES MAXIMUM FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.7482 INCHES MINIMUM AND | | 0.7491 INCHES MAXIMUM FIRST HOLE | | FEATURES PROVIDED | COTTER PIN | | THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.750 INCHES | | THREAD QUANTITY PER INCH | 16 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 1.012 INCHES MINIMUM AND | | 1.124 INCHES MAXIMUM | | FASTENER LENGTH | 4.762 INCHES MINIMUM AND | | 4.890 INCHES MAXIMUM | | MATERIAL | STEEL COMP E4340 OR | | STEEL COMP 4140 OR | | STEEL COMP 8740 OR | | STEEL COMP 4130 OR | | STEEL COMP 6150 OVERALL | | SURFACE TREATMENT | CADMIUM AND | | CHROMATE OVERALL |
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