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National Stock Number:
5305-01-029-7705
Federal Supply Class:
5305
National Item Identification Number:
010297705
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:
| 3M123-8-13 | 76301 | THE BOEING COMPANY | | 3M123-8-13 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT1029A-8-13 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT123-8-13 | 17446 | HUCK INTERNATIONAL, INC | | 54291-8-13 | 80539 | SPS TECHNOLOGIES, LLC | | HT1029A-8-13 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT8N-13 | 73197 | HI-SHEAR CORPORATION | | HT123-8-13 | 97928 | HUCK INTL INC | | HT8N-13 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNF | | NOMINAL THREAD DIAMETER | 0.500 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.756 INCHES MINIMUM AND | | 0.823 INCHES MAXIMUM | | FASTENER LENGTH | 1.578 INCHES MINIMUM AND | | 1.625 INCHES MAXIMUM | | MATERIAL | STEEL COMP 8617 OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | HARDNESS RATING | 24.0 ROCKWELL C MINIMUM AND | | 44.0 ROCKWELL C MAXIMUM OVERALL | | MINIMUM TENSILE STRENGTH | 130000 POUNDS PER SQUARE INCH | | MINIMUM YIELD STRENGTH | 85000 POUNDS PER SQUARE INCH | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 1.007 INCHES MINIMUM AND | | 1.014 INCHES MAXIMUM | | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 0.802 INCHES MINIMUM AND | | 0.822 INCHES MAXIMUM | | GRIP DIAMETER | 0.4990 INCHES MINIMUM AND | | 0.4995 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | 32.0 MICROINCHES THREADS |
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