6150-00-061-7860 END BELL,ELECTRICAL ROTATING EQU Index 4140-00-061-7862 FAN,TUBEAXIAL

National Stock Number:
5306-00-061-7861

Federal Supply Class:
5306

National Item Identification Number:
000617861

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:
3M33-12D2106065NEWPORT AERONAUTICAL SALES
3M33-12D2106710VALLEY-TODECO, INC.
3M33-12D2106950HOWMET GLOBAL FASTENING SYSTEMS INC
3M33-12D2117943FEDERAL MANUFACTURING CORP
3M33-12D2156878SPS TECHNOLOGIES, LLC
3M33-12D2176301THE BOEING COMPANY
3M33-12D2192215HOWMET GLOBAL FASTENING SYSTEMS INC
3M33-12D2193907TEXTRON FASTENING SYSTEMS DBA DECORAH OPERATIONS TFS


Techincal Specification:
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER2.171 INCHES MINIMUM AND 2.203 INCHES MAXIMUM FIRST HOLE
FASTENER LENGTH2.390 INCHES MINIMUM AND 2.437 INCHES MAXIMUM
GRIP DIAMETER0.7481 INCHES MINIMUM AND 0.7488 INCHES MAXIMUM
GRIP LENGTH1.302 INCHES MINIMUM AND 1.322 INCHES MAXIMUM
HEAD HEIGHT0.406 INCHES NOMINAL
HEAD STYLEHEXAGON
MATERIAL DOCUMENT AND CLASSIFICATIONAMS 5735 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALIRON ALLOY 660 OVERALL
NOMINAL THREAD DIAMETER0.750 INCHES
SHANK UNTHREADED HOLE DIAMETER0.141 INCHES MINIMUM AND 0.146 INCHES MAXIMUM FIRST HOLE
WIDTH BETWEEN FLATS1.052 INCHES MINIMUM AND 1.065 INCHES MAXIMUM
SURFACE FINISH32.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH32.0 MICROINCHES GRIP
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH1.094 INCHES MAXIMUM
THREAD QUANTITY PER INCH16
THREAD SERIES DESIGNATORUNF


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