8145-01-452-3819 CUSHIONING MATERIAL,PACKAGING Index 5305-01-452-3821 SCREW,MACHINE

National Stock Number:
5305-01-452-3820

Federal Supply Class:
5305

National Item Identification Number:
014523820

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:
LD111-0046-240606710VALLEY-TODECO, INC.
LD111-0046-240606725SPS TECHNOLOGIES, LLC
LD111-0046-240617446HUCK INTERNATIONAL, INC
LD111-0046-240623899J.W. MANUFACTURING, INC
LD111-0046-240627624SPS TECHNOLOGIES LLC
LD111-0046-240643999THE BOEING COMPANY
LD111-0046-240656878SPS TECHNOLOGIES, LLC
LD111-0046-240657928SONIC INDUSTRIES, INC.
LD111-0046-240673197HI-SHEAR CORPORATION
LD111-0046-240680539SPS TECHNOLOGIES, LLC
LD111-0046-240692215HOWMET GLOBAL FASTENING SYSTEMS INC


Techincal Specification:
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH0.757 INCHES MINIMUM AND 0.787 INCHES MAXIMUM
GRIP DIAMETER0.2802 INCHES MINIMUM AND 0.2807 INCHES MAXIMUM
GRIP LENGTH0.375 INCHES NOMINAL
HEAD DIAMETER0.464 INCHES MINIMUM AND 0.506 INCHES MAXIMUM
HEAD STYLEFLAT COUNTERSUNK
INTERNAL DRIVE STYLEOFFSET CRUCIFORM (TORQUE SET)
MATERIALSTEEL COMP XM-13 OVERALL
NOMINAL THREAD DIAMETER0.250 INCHES
SPECIAL FEATURESOVERSIZE GRIP DIA
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTPASSIVATE OVERALL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.397 INCHES NOMINAL
THREAD QUANTITY PER INCH28
THREAD SERIES DESIGNATORUNJF


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