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National Stock Number:
5305-01-348-7100
Federal Supply Class:
5305
National Item Identification Number:
013487100
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:
| 03A225-4-7 | 1W025 | NORTHROP GRUMMAN SYSTEMS CORP | | 03A225-4-7 | 76823 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | 123992-4-7 | 0PTK6 | SPS TECHNOLOGIES INC | | 123992-4-7 | 80539 | SPS TECHNOLOGIES, LLC | | 23992-4-7 | 05844 | CALLINS INDUSTRIES INC | | AIC1700-4-7 | 06725 | SPS TECHNOLOGIES, LLC | | DF33001V-4T-7 | 0HDW7 | HUCK INTERNATIONAL, INC. | | DF33001V-4T-7 | 97928 | HUCK INTL INC | | HR246-4-7 | 73197 | HI-SHEAR CORPORATION | | HR246-4-7 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | PBF1484-4-7 | 27624 | SPS TECHNOLOGIES LLC | | SC5027-4-7 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | SLB212-4-7 | 16258 | SPACE-LOK, INC. |
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Techincal Specification:
| COUNTERSINK ANGLE | 129.0 DEGREES MINIMUM AND 131.0 DEGREES MAXIMUM | | FASTENER LENGTH | 0.826 INCHES MINIMUM AND 0.856 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 0.428 INCHES MINIMUM AND 0.448 INCHES MAXIMUM | | HEAD DIAMETER | 0.5026 INCHES MINIMUM AND 0.5111 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS4928 ASSN STD SINGLE MATERIAL RESPONSE OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | TITANIUM ALLOY UNS R56400 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD32.0 MICROINCHES GRIP32.0 MICROINCHES THREADS | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.403 INCHES NOMINAL | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 28 |
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