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National Stock Number:
5305-01-308-8202
Federal Supply Class:
5305
National Item Identification Number:
013088202
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:
| 124894-3-2 | 56878 | SPS TECHNOLOGIES, LLC | | 3M939-3-2 | 76301 | THE BOEING COMPANY | | AIC939-3-2 | 06725 | SPS TECHNOLOGIES, LLC | | GS1018-3-2 | 1EM77 | B & B SPECIALTIES INC | | HR248-3-2PX | 73197 | HI-SHEAR CORPORATION | | HR248-3-2PX | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | SC1823-3-2 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | VT1731-3-2 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 0.516 INCHES MINIMUM AND 0.546 INCHES MAXIMUM | | GRIP LENGTH | 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM | | GRIP DIAMETER | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM | | HEAD DIAMETER | 0.2996 INCHES MINIMUM AND 0.3016 INCHES MAXIMUM | | HEAD HEIGHT | 0.013 INCHES MAXIMUM | | HEAD STYLE | FILLISTER COUNTERSUNK | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | MATERIAL | NICKEL ALLOY 718 OVERALL | | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD CLASS | 3A | | THREAD LENGTH | 0.381 INCHES MINIMUM AND 0.431 INCHES MAXIMUM | | THREAD DIRECTION | RIGHT-HAND | | THREAD QUANTITY PER INCH | 32 | | THREAD SERIES DESIGNATOR | UNJF |
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