5340-00-445-5297 STANDOFF,THREADED,SPACING Index 5330-00-445-5300 RUBBER STRIP

National Stock Number:
5305-00-445-5299

Federal Supply Class:
5305

National Item Identification Number:
004455299

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:
3M263-4-606950HOWMET GLOBAL FASTENING SYSTEMS INC
3M263-4-656878SPS TECHNOLOGIES, LLC
66117H4-650392SPS TECHNOLOGIES INC
66117H4-656878SPS TECHNOLOGIES, LLC
3M263-4-65R793HOWMET GLOBAL FASTENING SYSTEMS INC
3M263-4-676301THE BOEING COMPANY
HS2623-4Z617446HUCK INTERNATIONAL, INC
HT195-4-673197HI-SHEAR CORPORATION
HS2623-4Z697928HUCK INTL INC
HT195-4-6C4293ALCOA FASTENING SYSTEMS FAIRCHILDFASTENERS EUROPE - VSD GMBH
HT195-4-6L4528LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC
HT195-4-6R1120SATAIR A/S


Techincal Specification:
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH0.756 INCHES MINIMUM AND 0.803 INCHES MAXIMUM
GRIP DIAMETER0.2485 INCHES MINIMUM AND 0.2495 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 DIAMETER0.497 INCHES MINIMUM AND 0.507 INCHES MAXIMUM
HEAD STYLEFLAT COUNTERSUNK
INTERNAL DRIVE STYLEHIGH-TORQUE
MATERIALSTEEL COMP H11 OVERALL
MINIMUM TENSILE STRENGTH220000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER0.250 INCHES
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
THREAD DIRECTIONRIGHT-HAND
THREAD CLASS3A
THREAD LENGTH0.371 INCHES MINIMUM AND 0.438 INCHES MAXIMUM
THREAD SERIES DESIGNATORUNJF
THREAD QUANTITY PER INCH28


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