5305-01-164-7473 SCREW,CLOSE TOLERANCE Index 5305-01-164-7476 SCREW ASSEMBLY,PANEL

National Stock Number:
5305-01-164-7475

Federal Supply Class:
5305

National Item Identification Number:
011647475

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:
SS5112-42016258SPACE-LOK, INC.
SS5112-42073197HI-SHEAR CORPORATION
SS5112-42078286SIKORSKY AIRCRAFT CORPORATION
SS5112-42084256AVIBANK MFG., INC.
SS5112-420L4528LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC


Techincal Specification:
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER1.573 INCHES MINIMUM FIRST HOLE AND 1.593 INCHES MAXIMUM FIRST HOLE
FASTENER LENGTH1.668 INCHES MINIMUM AND 1.688 INCHES MAXIMUM
GRIP DIAMETER0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM
GRIP LENGTH1.250 INCHES MINIMUM AND 1.266 INCHES MAXIMUM
HEAD HEIGHT0.126 INCHES MINIMUM AND 0.141 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
PROPRIETARY CHARACTERISTICSPACS
NOMINAL THREAD DIAMETER0.250 INCHES
SHANK UNTHREADED HOLE DIAMETER0.076 INCHES MINIMUM FIRST HOLE AND 0.086 INCHES MAXIMUM FIRST HOLE
WIDTH BETWEEN FLATS0.430 INCHES MINIMUM AND 0.439 INCHES MAXIMUM
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 LENGTH0.277 INCHES MINIMUM AND 0.328 INCHES MAXIMUM
THREAD QUANTITY PER INCH28
THREAD SERIES DESIGNATORUNJF


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