5305-01-040-4706 SCREW,CAP,HEXAGON HEAD Index 5306-01-040-4709 BOLT,SHEAR

National Stock Number:
5306-01-040-4708

Federal Supply Class:
5306

National Item Identification Number:
010404708

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:
BACB30LJ4U706710VALLEY-TODECO, INC.
BACB30LJ4U706725SPS TECHNOLOGIES, LLC
BACB30LJ4U706950HOWMET GLOBAL FASTENING SYSTEMS INC
BACB30LJ4U717446HUCK INTERNATIONAL, INC
BACB30LJ4U717943FEDERAL MANUFACTURING CORP
BACB30LJ4U727624SPS TECHNOLOGIES LLC
BACB30LJ4U780539SPS TECHNOLOGIES, LLC
BACB30LJ4U781205THE BOEING COMPANY
BACB30LJ4U792215HOWMET GLOBAL FASTENING SYSTEMS INC
BACB30LJ4U797928HUCK INTL INC
BACB30LJ4U798524MONOGRAM AEROSPACE FASTENERS, INC
BACB30LJ4U7Z03F0BOEING DEFENCE AUSTRALIA LTD
BACB30LJ4U7Z8T75BOEING DEFENCE AUSTRALIA LTD


Techincal Specification:
FASTENER LENGTH0.811 INCHES MINIMUM AND 0.841 INCHES MAXIMUM
GRIP DIAMETER0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
GRIP LENGTH0.427 INCHES MINIMUM AND 0.447 INCHES MAXIMUM
HEAD HEIGHT0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM
HEAD STYLEUNDERCUT HEXAGON
MATERIALIRON ALLOY 660 OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES
WIDTH BETWEEN FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM
SPECIFICATION/STANDARD DATA97928-BACB30LJ MANUFACTURERS STANDARD
SURFACE FINISH32.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH32.0 MICROINCHES GRIP
SURFACE FINISH32.0 MICROINCHES THREADS
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.364 INCHES MINIMUM AND 0.414 INCHES MAXIMUM
THREAD SERIES DESIGNATORUNJF
THREAD QUANTITY PER INCH28


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