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National Stock Number:
5305-01-494-9015
Federal Supply Class:
5305
National Item Identification Number:
014949015
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:
| HT4020-7-19 | 0PTK6 | SPS TECHNOLOGIES INC | | HT4020-7-19 | 17446 | HUCK INTERNATIONAL, INC | | HT4020-7-19 | 73197 | HI-SHEAR CORPORATION | | HT4020-7-19 | 80539 | SPS TECHNOLOGIES, LLC | | HT4020-7-19 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4020-7-19 | 97928 | HUCK INTL INC | | ST3M652C7-19D | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | ST3M652C7-19D | 17446 | HUCK INTERNATIONAL, INC | | ST3M652C7-19D | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | ST3M652C7-19D | 60516 | WEST COAST AEROSPACE, INC. | | ST3M652C7-19D | 76301 | THE BOEING COMPANY | | HT4020-7-19 | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION | | HT4020-7-19 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.438 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.630 INCHES MINIMUM AND | | 0.697 INCHES MAXIMUM | | FASTENER LENGTH | 1.807 INCHES MINIMUM AND | | 1.894 INCHES MAXIMUM | | MATERIAL | STEEL COMP XM-13 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | FLAT COUNTERSUNK UNDERCUT | | HEAD DIAMETER | 0.881 INCHES MINIMUM AND | | 0.888 INCHES MAXIMUM | | HEAD HEIGHT | 0.130 INCHES MINIMUM AND | | 0.133 INCHES MAXIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 1.1775 INCHES MINIMUM AND | | 1.1975 INCHES MAXIMUM | | GRIP DIAMETER | 0.4365 INCHES MINIMUM AND | | 0.4370 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | 32.0 MICROINCHES THREADS |
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