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National Stock Number:
5305-01-584-5745
Federal Supply Class:
5305
National Item Identification Number:
015845745
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:
| BM33024V5-4 | 17446 | HUCK INTERNATIONAL, INC | | HT8137-5-4 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | ST3M430V5-4D | 1VSL7 | HOUSTON PRECISION FASTENERS I LP | | ST3M430V5-4D | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | ST3M430V5-4D | 73197 | HI-SHEAR CORPORATION | | ST3M430V5-4D | 76301 | THE BOEING COMPANY | | WC8137-5-4 | 60516 | WEST COAST AEROSPACE, INC. | | ST3M430V5-4D | 80539 | SPS TECHNOLOGIES, LLC | | ST3M430V5-4D | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | THREAD QUANTITY PER INCH | 24 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.531 INCHES NOMINAL | | FASTENER LENGTH | 0.781 INCHES NOMINAL | | MATERIAL | TITANIUM OVERALL | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.628 INCHES MINIMUM AND | | 0.634 INCHES MAXIMUM | | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 0.250 INCHES NOMINAL | | GRIP DIAMETER | 0.311 INCHES MINIMUM AND | | 0.312 INCHES MAXIMUM |
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