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National Stock Number:
5305-01-494-8012
Federal Supply Class:
5305
National Item Identification Number:
014948012
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:
| HT4020-5-16 | 73197 | HI-SHEAR CORPORATION | | HT4020-5-16 | 80539 | SPS TECHNOLOGIES, LLC | | ST3M652C5-16D | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | ST3M652C5-16D | 17446 | HUCK INTERNATIONAL, INC | | HT4020-5-16 | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION | | HT4020-5-16 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | ST3M652C5-16D | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | ST3M652C5-16D | 60516 | WEST COAST AEROSPACE, INC. | | ST3M652C5-16D | 76301 | THE BOEING COMPANY |
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Techincal Specification:
| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | FASTENER LENGTH | 1.515 INCHES MINIMUM AND 1.562 INCHES MAXIMUM | | GRIP DIAMETER | 0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM | | GRIP LENGTH | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM | | HEAD HEIGHT | 0.0878 INCHES MINIMUM AND 0.0898 INCHES MAXIMUM | | HEAD DIAMETER | 0.6287 INCHES MINIMUM AND 0.6335 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK UNDERCUT | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL | STEEL CORROSION RESISTING OVERALL | | NOMINAL THREAD DIAMETER | 0.3125 INCHES | | PART NAME ASSIGNED BY CONTROLLING AGENCY | NAVY SPECIAL PROJECT | | SPECIAL FEATURES | ITEM INTENDED FOR USE IN FUEL SEALING APPLICATIONS | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.531 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 24 |
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