5305-01-538-8106 THUMBSCREW Index 5998-01-538-8108 BACKPLANE ASSEMBLY

National Stock Number:
5305-01-538-8107

Federal Supply Class:
5305

National Item Identification Number:
015388107

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:
C7985-3D6R06725SPS TECHNOLOGIES, LLC
C7985-3D6R06950HOWMET GLOBAL FASTENING SYSTEMS INC
C7985-3D6R0K6Z0SATURN FASTENERS INC
C7985-3D6R17446HUCK INTERNATIONAL, INC
C7985-3D6R27624SPS TECHNOLOGIES LLC
C7985-3D6R56878SPS TECHNOLOGIES, LLC
C7985-3D6R80539SPS TECHNOLOGIES, LLC
C7985-3D6R81755LOCKHEED MARTIN CORPORATION
C7985-3D6R92215HOWMET GLOBAL FASTENING SYSTEMS INC


Techincal Specification:
DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER0.583 INCHES MINIMUM AND 0.613 INCHES MAXIMUM FIRST HOLE
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH0.723 INCHES MINIMUM AND 0.753 INCHES MAXIMUM
GRIP DIAMETER0.2041 INCHES MINIMUM AND 0.2051 INCHES MAXIMUM
GRIP LENGTH0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM
HARDNESS RATING46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER0.258 INCHES MINIMUM AND 0.305 INCHES MAXIMUM
HEAD STYLEFLAT COUNTERSUNK
INTERNAL DRIVE STYLEOFFSET CRUCIFORM (TORQUE SET)
MATERIALSTEEL COMP H11 OVERALL
MINIMUM TENSILE STRENGTH22000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER0.190 INCHES
SHANK UNTHREADED HOLE DIAMETER0.070 INCHES MINIMUM AND 0.080 INCHES MAXIMUM FIRST HOLE
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONNAS672 ASSN STD SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTCADMIUM OVERALL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.276 INCHES MINIMUM AND 0.388 INCHES MAXIMUM
THREAD QUANTITY PER INCH32
THREAD SERIES DESIGNATORUNJF


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