5305-01-186-3091 SCREW,CLOSE TOLERANCE Index 5305-01-186-3093 SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-186-3092

Federal Supply Class:
5305

National Item Identification Number:
011863092

Description:
SCREW,CLOSE TOLERANCE

Detail:
A SCREW, MACHINE or SCREW, CAP, SOCKET HEAD whose unthreaded portion is of specified grip length, plated or unplated, and is machined to a tolerance of one thousandth (0.001 IN.) (0.025 mm) or less of a specific diameter for items (1.000 IN.) (25 mm) or less in diameter. Items over (1.000 IN.) (25 mm) in diameter shall have a tolerance of fifteen ten thousandths (0.0015 IN.) (0.038 mm) or less. The nominal major diameter of the threads shall be at least one thousandth (0.001 IN.) (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 designed to be held or driven with an inserted driver. It is not designed for rotation by the thumb and fingers. A locking feature may be incorporated in the design of the head or threads.


Manufacturer Information:
MS3369B92696906MILITARY STANDARDS PROMULGATED BY MILITARY DEPARTMENTS UNDER AUTHORITY OF DEFENSE STANDARDIZATION MANUAL 4120 3-M


Techincal Specification:
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER2.243 INCHES MINIMUM AND 2.263 INCHES MAXIMUM FIRST HOLE
FASTENER LENGTH2.411 INCHES MINIMUM AND 2.431 INCHES MAXIMUM
GRIP DIAMETER0.5611 INCHES MINIMUM AND 0.5616 INCHES MAXIMUM
GRIP LENGTH1.625 INCHES MINIMUM AND 1.641 INCHES MAXIMUM
HEAD HEIGHT0.282 INCHES MINIMUM AND 0.297 INCHES MAXIMUM
HEAD STYLECROWNED HEXAGON
INTERNAL DRIVE STYLESLOT
LOCKING FEATUREDETENT BALL GRIP
MATERIAL DOCUMENT AND CLASSIFICATIONAMS5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP XM-13 OVERALL
MINIMUM TENSILE STRENGTH63000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER0.562 INCHES
SHANK UNTHREADED HOLE DIAMETER0.141 INCHES MINIMUM AND 0.151 INCHES MAXIMUM FIRST HOLE
SURFACE FINISH32.0 MICROINCHES BEARING SURFACE OF HEAD
SURFACE FINISH32.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.505 INCHES MINIMUM AND 0.556 INCHES MAXIMUM
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF)
THREAD QUANTITY PER INCH18
WIDTH BETWEEN FLATS0.865 INCHES MINIMUM AND 0.877 INCHES MAXIMUM


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