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National Stock Number:
5305-01-514-4084
Federal Supply Class:
5305
National Item Identification Number:
015144084
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:
| HT4027-7-16 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4027-7-16 | 0PTK6 | SPS TECHNOLOGIES INC | | HT4027-7-16 | 56878 | SPS TECHNOLOGIES, LLC | | HT4027-7-16 | 73197 | HI-SHEAR CORPORATION | | HT4027-7-16 | 80539 | SPS TECHNOLOGIES, LLC | | HT4027-7-16 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | ST3M557-7-16 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | WC4027-7-16 | 60516 | WEST COAST AEROSPACE, INC. | | ST3M557-7-16 | 76301 | THE BOEING COMPANY |
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Techincal Specification:
| FASTENER LENGTH | 1.656 INCHES NOMINAL | | GRIP LENGTH | 1.000 INCHES NOMINAL | | GRIP DIAMETER | 0.437 INCHES NOMINAL | | HEAD DIAMETER | 0.672 INCHES NOMINAL | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | NICKEL ALLOY 718 OVERALL | | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.438 INCHES | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 3A | | THREAD LENGTH | 0.656 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 20 |
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