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National Stock Number:
5305-01-011-3933
Federal Supply Class:
5305
National Item Identification Number:
010113933
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:
| 73991H-6D-18 | 56878 | SPS TECHNOLOGIES, LLC | | 73991H-6D-18 | 80539 | SPS TECHNOLOGIES, LLC | | BM19031-6-18D | 17446 | HUCK INTERNATIONAL, INC | | BM19031-6-18D | 55345 | ALAMO AIRCRAFT, LTD. | | BM19031-6-18D | 97928 | HUCK INTL INC | | HT309-6D-18 | 73197 | HI-SHEAR CORPORATION | | HT309-6D-18 | C4293 | ALCOA FASTENING SYSTEMS FAIRCHILDFASTENERS EUROPE - VSD GMBH | | HT309-6D-18 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | HT309-6D-18 | R1120 | SATAIR A/S | | HT8177-6D-18 | 5M902 | HOWMET GLOBAL FASTENING SYSTEMS INC. | | HT8177-6D-18 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT8177-6D-18 | C4293 | ALCOA FASTENING SYSTEMS FAIRCHILDFASTENERS EUROPE - VSD GMBH | | ST3M562-6D18 | 55345 | ALAMO AIRCRAFT, LTD. | | ST3M562-6D18 | 76301 | THE BOEING COMPANY | | ST3M562-6D18 | 9S754 | HUNTINGTON VALLEY INDUSTRIES, INC. |
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.115 INCHES MINIMUM AND 0.125 INCHES MAXIMUM FIRST HOLE | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 1.515 INCHES MINIMUM AND 1.535 INCHES MAXIMUM | | GRIP DIAMETER | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM | | GRIP LENGTH | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM | | HEAD DIAMETER | 0.752 INCHES MINIMUM AND 0.762 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL DOCUMENT AND CLASSIFICATION | 23-105 FSCM 76301 MFR REF SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL OVERALL | | MINIMUM TENSILE STRENGTH | 17000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.375 INCHES | | SHANK UNTHREADED HOLE DIAMETER | 0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM FIRST HOLE | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MAC PS13145,MCDONNELL DOUGLAS CORP MFR REF SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.400 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 24 |
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