5306-01-419-3901 BOLT,CLOSE TOLERANCE Index 5306-01-419-3903 BOLT,CLOSE TOLERANCE

National Stock Number:
5306-01-419-3902

Federal Supply Class:
5306

National Item Identification Number:
014193902

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.


Manufacturer Information:
S4928913-5-1406725SPS TECHNOLOGIES, LLC
S4928913-5-1427624SPS TECHNOLOGIES LLC
S4928913-5-1456878SPS TECHNOLOGIES, LLC
S4928913-5-1488277THE BOEING COMPANY


Techincal Specification:
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER1.133 INCHES NOMINAL THREADS
FASTENER LENGTH1.235 INCHES MINIMUM AND 1.265 INCHES MAXIMUM
GRIP DIAMETER0.3108 INCHES MINIMUM AND 0.3117 INCHES MAXIMUM
GRIP LENGTH0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM
HARDNESS RATING36.0 ROCKWELL C MINIMUM OVERALL AND 40.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT0.156 INCHES MINIMUM AND 0.171 INCHES MAXIMUM
HEAD STYLEDISHED HEXAGON
MATERIALSTEEL COMP 4140 OVERALL OR STEEL COMP 4340 OVERALL OR STEEL COMP 8735 OVERALL OR STEEL COMP 8740 OVERALL OR STEEL COMP 6150 OVERALL
PROPRIETARY CHARACTERISTICSPACS
NOMINAL THREAD DIAMETER0.312 INCHES
SHANK UNTHREADED HOLE DIAMETER0.076 INCHES MINIMUM THREADS AND 0.086 INCHES MAXIMUM THREADS
WIDTH BETWEEN FLATS0.492 INCHES MINIMUM AND 0.502 INCHES MAXIMUM
SURFACE FINISH63.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH63.0 MICROINCHES GRIP
SURFACE FINISH32.0 MICROINCHES THREADS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONDPS9.74, TYPE 1 MFR REF SINGLE TREATMENT RESPONSE HEAD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONDPS9.74, TYPE 1 MFR REF SINGLE TREATMENT RESPONSE THREADS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONDPS9.84, TYPE 1 MFR REF SINGLE TREATMENT RESPONSE BEARING SURFACE OF HEAD
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONDPS9.84, TYPE 1 MFR REF SINGLE TREATMENT RESPONSE GRIP
SURFACE TREATMENTCADMIUM HEAD
SURFACE TREATMENTCADMIUM THREADS
SURFACE TREATMENTCHROMIUM BEARING SURFACE OF HEAD
SURFACE TREATMENTCHROMIUM GRIP
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.375 INCHES MAXIMUM
THREAD QUANTITY PER INCH24
THREAD SERIES DESIGNATORUNF


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