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National Stock Number:
5305-01-538-1828
Federal Supply Class:
5305
National Item Identification Number:
015381828
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:
| 110179-3-9ASM | 80539 | SPS TECHNOLOGIES, LLC | | ST3M430V3-9ASM | 76301 | THE BOEING COMPANY |
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Techincal Specification:
| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | FASTENER LENGTH | 0.952 INCHES MINIMUM AND 0.999 INCHES MAXIMUM | | GRIP DIAMETER | 0.189 INCHES NOMINAL | | GRIP LENGTH | 0.552 INCHES MINIMUM AND 0.572 INCHES MAXIMUM | | HEAD DIAMETER | 0.376 INCHES MINIMUM AND 0.381 INCHES MAXIMUM | | HEAD HEIGHT | 0.044 INCHES MINIMUM AND 0.046 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK UNDERCUT | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL DOCUMENT AND CLASSIFICATION | NAS 621 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | TITANIUM ALLOY UNS R56400 OVERALL | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, CLOSE TOLERANCE-ASSEMBLED O-RING | | SPECIAL FEATURES | ST3M430 SERIES BOLTS ARE TO BE USED IN FUEL SEALING APPLICATION. TEMP RANGE -70DEG (F) TO +350DEG (F) GRIP AND THREAD HAVE DRY FILM LUBRICANT PER MIL-L-8937 PLUS CETYL ALCOHOL. SIMILIAR TO BUT NOT THE SAME AS NSN 5305-01-231-7413. THE -7413 DOES NOT INCLUDE DRYFILM LUBRICANT. FURNISHED WITH (1) O-RING | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 32 | | THREAD SERIES DESIGNATOR | UNJF |
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