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National Stock Number:
5305-01-507-4373
Federal Supply Class:
5305
National Item Identification Number:
015074373
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:
| HT4027-9D45 | 56878 | SPS TECHNOLOGIES, LLC | | HT4027-9D45 | 73197 | HI-SHEAR CORPORATION | | ST3M557-9D45 | 1VSL7 | HOUSTON PRECISION FASTENERS I LP | | ST3M557 | 76301 | THE BOEING COMPANY | | HT4027-9D45 | 80539 | SPS TECHNOLOGIES, LLC | | HT4027-9D45 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | ST3M557-9D45 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | ST3M557-9D45 | 76301 | THE BOEING COMPANY |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 3.7035 INCHES MINIMUM AND 3.7335 INCHES MAXIMUM | | GRIP DIAMETER | 0.5610 INCHES MINIMUM AND 0.5615 INCHES MAXIMUM | | GRIP LENGTH | 2.8025 INCHES MINIMUM AND 2.8225 INCHES MAXIMUM | | HEAD DIAMETER | 0.838 INCHES NOMINAL | | HEAD STYLE | FLAT COUNTERSUNK | | HOLE CONFIGURATION STYLE | ROUND | | HOLE DIAMETER | 0.141 INCHES MINIMUM AND 0.146 INCHES MAXIMUM | | HOLE QUANTITY | 1 | | HOLE TYPE | DRILLED | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | NICKEL ALLOY 718 OVERALL | | NOMINAL THREAD DIAMETER | 0.5625 INCHES | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.906 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 18 |
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