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National Stock Number:
5305-01-532-3056
Federal Supply Class:
5305
National Item Identification Number:
015323056
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:
| BACS12JB3A5 | 06725 | SPS TECHNOLOGIES, LLC | | BACS12JB3A5 | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | BACS12JB3A5 | 1GP79 | PILGRIM SCREW CORP | | BACS12JB3A5 | 81205 | THE BOEING COMPANY |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 4.990 INCHES MINIMUM AND 5.010 INCHES MAXIMUM | | GRIP DIAMETER | 0.010 INCHES MINIMUM AND 0.020 INCHES MAXIMUM | | GRIP LENGTH | 0.310 INCHES NOMINAL | | HEAD DIAMETER | 0.328 INCHES NOMINAL | | HEAD HEIGHT | 0.080 INCHES NOMINAL | | HEAD STYLE | FILLISTER COUNTERSUNK | | INTERNAL DRIVE STYLE | TORX | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | SPECIAL FEATURES | ITEM IS LUBRICATED WITH CETYL ALCOHOL PER MIL-L-87132,TYPE III,GRADE B | | SPECIAL TEST FEATURES | THERE IS A HOLE DRILLED THROUGH THE THREADS, DIAMETER OF .070 | | SURFACE TREATMENT | CADMIUM OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.276 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 32 | | THREAD SERIES DESIGNATOR | UNJF |
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