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National Stock Number:
5305-01-013-9431
Federal Supply Class:
5305
National Item Identification Number:
010139431
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.
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Manufacturer Information:
| 110121T6D15 | 80539 | SPS TECHNOLOGIES, LLC |
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.306 INCHES MINIMUM AND 1.356 INCHES MAXIMUM FIRST HOLE | | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | FASTENER LENGTH | 1.517 INCHES MINIMUM AND 1.547 INCHES MAXIMUM | | GRIP DIAMETER | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM | | GRIP LENGTH | 0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM | | HEAD DIAMETER | 0.515 INCHES MINIMUM AND 0.566 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | MATERIAL DOCUMENT AND CLASSIFICATION | NAS621,COMP 6AL-4V ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | TITANIUM ALLOY UNS R54520 OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.375 INCHES | | SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES MINIMUM AND 0.116 INCHES MAXIMUM FIRST HOLE | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | SURFACE FINISH | 63.0 MICROINCHES GRIP | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.569 INCHES MINIMUM AND 0.619 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 24 |
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