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National Stock Number:
5305-01-624-3455
Federal Supply Class:
5305
National Item Identification Number:
016243455
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:
| 03A519-4-15C | 1W025 | NORTHROP GRUMMAN SYSTEMS CORP | | CB9350-4-15C | 66530 | CLICK BOND INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.2500 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.425 INCHES NOMINAL | | FASTENER LENGTH | 1.3625 INCHES NOMINAL | | MATERIAL | PLASTIC TOP OF HEAD | | TITANIUM ALLOY UNS R56400 FASTENER | | COLOR | GRAY/GREY TOP OF HEAD | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | HEAD STYLE | FILLISTER COUNTERSUNK | | HEAD DIAMETER | 0.478 INCHES MINIMUM AND | | 0.488 INCHES MAXIMUM | | HEAD HEIGHT | 0.0769 INCHES MINIMUM AND | | 0.0799 INCHES MAXIMUM | | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | INTERNAL DRIVE STYLE | TORX | | SPLINE MAJOR DIAMETER | 0.173 INCHES MINIMUM AND | | 0.183 INCHES MAXIMUM | | GRIP LENGTH | 0.9375 INCHES NOMINAL | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM | | SPECIAL FEATURES | THE SCREW IS SPECIAL DUE TO THE CAPPED MATERIAL (09A196-2) THAT IS INSTALLED ON TOP OF THE HEAD; THE HEIGHT:HEAD PROT 0.0769 MIN 0.0799 MAX AND WIDTH: GAGE DIA 0.4243 MIN 0.4245 MAX OF THE CAP MATERIAL IS VERY CRITICAL TO THE COATINGS OF THE AIRCRAFT; THE FIT OF THE CAP MATERIAL | | SUPPLEMENTARY FEATURES | CAP DETAIL SHALL BE PERMANTLY AFFIXED TO THE BOLT |
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