5305-01-210-0794 SCREW,CLOSE TOLERANCE Index 5305-01-210-0796 SCREW,CLOSE TOLERANCE

National Stock Number:
5305-01-210-0795

Federal Supply Class:
5305

National Item Identification Number:
012100795

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:
3M963-4L406725SPS TECHNOLOGIES, LLC
3M963-4L406950HOWMET GLOBAL FASTENING SYSTEMS INC
3M963-4L417446HUCK INTERNATIONAL, INC
3M963-4L458845ABOUNDING SECURITY INC DIV OF MAA CORP
3M963-4L476301THE BOEING COMPANY
3M963-4L480539SPS TECHNOLOGIES, LLC
3M963-4L497928HUCK INTL INC


Techincal Specification:
COUNTERSINK ANGLE99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM
FASTENER LENGTH0.704 INCHES MINIMUM AND 0.734 INCHES MAXIMUM
GRIP DIAMETER0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM
GRIP LENGTH0.240 INCHES MINIMUM AND 0.260 INCHES MAXIMUM
HARDNESS RATING39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
HEAD DIAMETER0.3898 INCHES MINIMUM AND 0.3948 INCHES MAXIMUM
HEAD STYLEOVAL COUNTERSUNK
INTERNAL DRIVE STYLEOFFSET CRUCIFORM (TORQUE SET)
MATERIAL DOCUMENT AND CLASSIFICATIONMIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL
MATERIALSTEEL COMP 8740 OVERALL
MINIMUM TENSILE STRENGTH180000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER0.250 INCHES
SURFACE FINISH32.0 MICROINCHES GRIP
SURFACE FINISH32.0 MICROINCHES THREADS
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONMIL-C-83488,TYPE 2 CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL
SURFACE TREATMENTALUMINUM OVERALL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.444 INCHES MINIMUM AND 0.494 INCHES MAXIMUM
THREAD SERIES DESIGNATORUNJF
THREAD QUANTITY PER INCH28


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