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National Stock Number:
5305-01-399-6104
Federal Supply Class:
5305
National Item Identification Number:
013996104
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:
| 03A174-4-4 | 06892 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | 03A174-4-4 | 1W025 | NORTHROP GRUMMAN SYSTEMS CORP | | AIC1652-4-4 | 06725 | SPS TECHNOLOGIES, LLC | | HR240-4-4 | 73197 | HI-SHEAR CORPORATION | | 123743-4-4 | 80539 | SPS TECHNOLOGIES, LLC | | HR240-4-4 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | SC3102-4-4 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | SC3102-4-4 | 0PTK6 | SPS TECHNOLOGIES INC | | SLB146-4-4 | 16258 | SPACE-LOK, INC. | | T009-4-4 | 17446 | HUCK INTERNATIONAL, INC | | PBF1417-4-4 | 27624 | SPS TECHNOLOGIES LLC | | T009-4-4 | 97928 | HUCK INTL INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.2500 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.425 INCHES NOMINAL | | FASTENER LENGTH | 0.660 INCHES MINIMUM AND | | 0.690 INCHES MAXIMUM | | MATERIAL | TITANIUM ALLOY UNS R56400 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OR | | AMS 4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.449 INCHES MINIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | GRIP LENGTH | 0.240 INCHES MINIMUM AND | | 0.260 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM |
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