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National Stock Number:
5305-00-395-1999
Federal Supply Class:
5305
National Item Identification Number:
003951999
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:
| AN5-C33 | 77445 | RTX CORPORATION | | LS15265V4-2 | 03038 | LONG-LOK, LLC | | LS15265V4-2 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | LS15265V4-2 | 26233 | NYLOK LLC | | LS15265V4-2 | 56878 | SPS TECHNOLOGIES, LLC | | LS15265V4-2 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | LS15265V4-2 | 98897 | LOCKHEED MARTIN CORP |
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Techincal Specification:
| FASTENER LENGTH | 0.426 INCHES MINIMUM AND 0.456 INCHES MAXIMUM | | GRIP LENGTH | 0.115 INCHES MINIMUM AND 0.135 INCHES MAXIMUM | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | HEAD DIAMETER | 0.473 INCHES MINIMUM AND 0.492 INCHES MAXIMUM | | HEAD HEIGHT | 0.162 INCHES MINIMUM AND 0.175 INCHES MAXIMUM | | HEAD STYLE | PAN | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 4928 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | TITANIUM ALLOY UNS R56400 OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.291 INCHES MINIMUM AND 0.341 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) | | THREAD QUANTITY PER INCH | 28 |
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