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National Stock Number:
5305-01-521-7006
Federal Supply Class:
5305
National Item Identification Number:
015217006
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:
| 3M1170C4-16A | 76301 | THE BOEING COMPANY | | TX1027C4-16A | 06725 | SPS TECHNOLOGIES, LLC | | TX1027C4-16A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | TX1027C4-16A | 0PTK6 | SPS TECHNOLOGIES INC | | TX1027C4-16A | 27624 | SPS TECHNOLOGIES LLC | | TX1027C4-16A | 56878 | SPS TECHNOLOGIES, LLC | | TX1027C4-16A | 73197 | HI-SHEAR CORPORATION | | TX1027C4-16A | 80539 | SPS TECHNOLOGIES, LLC | | TX1027C4-16A | C4293 | ALCOA FASTENING SYSTEMS FAIRCHILDFASTENERS EUROPE - VSD GMBH | | TX1027C4-16A | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| FASTENER LENGTH | 1.410 INCHES MINIMUM AND 1.440 INCHES MAXIMUM | | GRIP LENGTH | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM | | GRIP DIAMETER | 0.249 INCHES NOMINAL | | HEAD DIAMETER | 0.3859 INCHES MINIMUM AND 0.3948 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | TORX | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT | | POINT DIAMETER | 0.425 INCHES NOMINAL | | POINT STYLE | FLAT | | SPLINE MAJOR DIAMETER | 0.154 INCHES MINIMUM AND 0.156 INCHES MAXIMUM | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.420 INCHES MINIMUM AND 0.430 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 28 |
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