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National Stock Number:
5305-01-295-3037
Federal Supply Class:
5305
National Item Identification Number:
012953037
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:
| HT4048-8D24 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4048-8D24 | 17446 | HUCK INTERNATIONAL, INC | | HT4048-8D24 | 56878 | SPS TECHNOLOGIES, LLC | | HT4048-8D24 | 73197 | HI-SHEAR CORPORATION | | HT4048-8D24 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4048-8D24 | 97928 | HUCK INTL INC | | ST3M713-8D24 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | ST3M713-8D24 | 17446 | HUCK INTERNATIONAL, INC | | ST3M713-8D24 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | ST3M713-8D24 | 60516 | WEST COAST AEROSPACE, INC. | | ST3M713-8D24 | 76301 | THE BOEING COMPANY | | ST3M713-8D24 | 80539 | SPS TECHNOLOGIES, LLC | | ST3M713-8D24 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4048-8D24 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | ST3M713-8D24 | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.500 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.428 INCHES MINIMUM AND | | 0.478 INCHES MAXIMUM | | FASTENER LENGTH | 1.938 INCHES MINIMUM AND | | 1.968 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 | | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.688 INCHES MINIMUM AND | | 0.755 INCHES MAXIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 1.490 INCHES MINIMUM AND | | 1.510 INCHES MAXIMUM | | GRIP DIAMETER | 0.4990 INCHES MINIMUM AND | | 0.4995 INCHES MAXIMUM | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.808 INCHES MINIMUM AND | | 1.848 INCHES MAXIMUM FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES MINIMUM AND | | 0.111 INCHES MAXIMUM FIRST HOLE |
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