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National Stock Number:
5305-01-521-7431
Federal Supply Class:
5305
National Item Identification Number:
015217431
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:
| 3M1169C4-23A | 007R1 | TWIST TITE MFG, INC | | 3M1169C4-23A | 76301 | THE BOEING COMPANY | | TX1026C4-23A | 06725 | SPS TECHNOLOGIES, LLC | | TX1026C4-23A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | TX1026C4-23A | 0PTK6 | SPS TECHNOLOGIES INC | | TX1026C4-23A | 27624 | SPS TECHNOLOGIES LLC | | TX1026C4-23A | 56878 | SPS TECHNOLOGIES, LLC | | TX1026C4-23A | 73197 | HI-SHEAR CORPORATION | | TX1026C4-23A | 80539 | SPS TECHNOLOGIES, LLC | | TX1026C4-23A | C4293 | ALCOA FASTENING SYSTEMS FAIRCHILDFASTENERS EUROPE - VSD GMBH | | TX1026C4-23A | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | CRITICALITY CODE JUSTIFICATION | AGAV | | FASTENER LENGTH | 1.722 INCHES MINIMUM AND 1.752 INCHES MAXIMUM | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 1.437 INCHES NOMINAL | | HEAD DIAMETER | 0.4970 INCHES MINIMUM AND 0.5066 INCHES MAXIMUM | | HEAD HEIGHT | 0.110 INCHES NOMINAL | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | TORX | | MATERIAL | NICKEL ALLOY 718 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SPLINE MAJOR DIAMETER | 0.219 INCHES MINIMUM AND 0.222 INCHES MAXIMUM | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.425 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 28 | | THREAD SERIES DESIGNATOR | UNJF |
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