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National Stock Number:
5305-01-587-8826
Federal Supply Class:
5305
National Item Identification Number:
015878826
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:
| CA21062-06-2-24 | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. |
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Techincal Specification:
| FASTENER LENGTH | 1.500 INCHES NOMINAL | | GRIP DIAMETER | 0.136 INCHES MINIMUM AND 0.137 INCHES MAXIMUM | | GRIP LENGTH | 0.062 INCHES NOMINAL | | HEAD DIAMETER | 0.256 INCHES MINIMUM AND 0.270 INCHES MAXIMUM | | HEAD HEIGHT | 0.087 INCHES MINIMUM AND 0.097 INCHES MAXIMUM | | HEAD STYLE | PAN | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 | | MATERIAL | STEEL COMP 302 OVERALL OR STEEL COMP 304 OVERALL OR STEEL COMP 305 OVERALL OR STEEL COMP 304L OVERALL OR STEEL COMP 310 OVERALL OR STEEL COMP 316 OVERALL OR STEEL COMP 316L OVERALL OR STEEL COMP 317 OVERALL OR STEEL COMP 321 OVERALL OR STEEL COMP 347 OVERALL OR STEEL COMP 309 OVERALL | | PROPRIETARY CHARACTERISTICS | PACS | | NOMINAL THREAD DIAMETER | 0.138 INCHES | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 1.338 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 32 | | THREAD SERIES DESIGNATOR | UNC |
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