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National Stock Number:
5305-00-279-9056
Federal Supply Class:
5305
National Item Identification Number:
002799056
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:
| 202-15503-3-2 | 80378 | TRIUMPH AEROSTRUCTURES, LLC | | AS146S3-2 | 84256 | AVIBANK MFG., INC. | | CA27034-3-2 | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 0.622 INCHES MINIMUM AND 0.642 INCHES MAXIMUM | | GRIP LENGTH | 0.063 INCHES MINIMUM AND 0.125 INCHES MAXIMUM | | GRIP DIAMETER | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM | | HEAD DIAMETER | 0.266 INCHES MINIMUM AND 0.303 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 | | LOCKING FEATURE | DETENT BALL GRIP | | MATERIAL | STEEL COMP 6120H AND STEEL COMP 8740 OVERALL | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY 2,CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.497 INCHES MINIMUM AND 0.579 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 32 | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |
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