5305-00-533-8231 SCREW,MACHINE Index 4470-00-533-8237 LOCKNUT

National Stock Number:
5306-00-533-8232

Federal Supply Class:
5306

National Item Identification Number:
005338232

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:
110185-4-24M56878SPS TECHNOLOGIES, LLC
110185-4-24M80539SPS TECHNOLOGIES, LLC
BM15016-4-24A17446HUCK INTERNATIONAL, INC
BM15016-4-24A97928HUCK INTL INC
GB511BY4M2406725SPS TECHNOLOGIES, LLC
GB511BY4M2426512NORTHROP GRUMMAN SYSTEMS CORPORATION
GB511BY4M2427624SPS TECHNOLOGIES LLC
GB511BY4M2456878SPS TECHNOLOGIES, LLC
GB511BY4M2492215HOWMET GLOBAL FASTENING SYSTEMS INC
VEH160271-4M2406710VALLEY-TODECO, INC.


Techincal Specification:
FASTENER LENGTH1.910 INCHES MINIMUM AND 1.940 INCHES MAXIMUM
GRIP DIAMETER0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
GRIP LENGTH1.490 INCHES MINIMUM AND 1.510 INCHES MAXIMUM
HEAD HEIGHT0.125 INCHES MINIMUM AND 0.140 INCHES MAXIMUM
HEAD STYLEHEXAGON
MATERIALTITANIUM ALLOY OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES
PART NAME ASSIGNED BY CONTROLLING AGENCYNAVY SPECIAL PROJECT
SPECIAL FEATURESDRY FILM LUBRICANT
SPECIFICATION/STANDARD DATA26512-GB511BY4-24 MANUFACTURERS STANDARD
WIDTH BETWEEN FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM
SURFACE FINISH63.0 MICROINCHES BEARING SURFACE OF HEAD
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.400 INCHES MINIMUM AND 0.450 INCHES MAXIMUM
THREAD QUANTITY PER INCH28
THREAD SERIES DESIGNATORUNJF


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