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National Stock Number:
5305-01-435-0457
Federal Supply Class:
5305
National Item Identification Number:
014350457
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:
| BACB30LU14-53 | 06710 | VALLEY-TODECO, INC. | | BACB30LU14-53 | 06725 | SPS TECHNOLOGIES, LLC | | BACB30LU14-53 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30LU14-53 | 17446 | HUCK INTERNATIONAL, INC | | BACB30LU14-53 | 17943 | FEDERAL MANUFACTURING CORP | | BACB30LU14-53 | 27624 | SPS TECHNOLOGIES LLC | | BACB30LU14-53 | 80539 | SPS TECHNOLOGIES, LLC | | BACB30LU14-53 | 81205 | THE BOEING COMPANY | | BACB30LU14-53 | 97928 | HUCK INTL INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 4.4815 INCHES MINIMUM AND 4.5115 INCHES MAXIMUM | | GRIP DIAMETER | 0.8730 INCHES MINIMUM AND 0.8740 INCHES MAXIMUM | | GRIP LENGTH | 3.3025 INCHES MINIMUM AND 3.3225 INCHES MAXIMUM | | HEAD DIAMETER | 1.643 INCHES MINIMUM AND 1.793 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 | | MATERIAL DOCUMENT AND CLASSIFICATION | | | MATERIAL | | | NOMINAL THREAD DIAMETER | 0.8750 INCHES | | SURFACE TREATMENT | | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 1.184 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 14 | | THREAD SERIES DESIGNATOR | UNIFIED NATIONAL JOINT FINE (UNJF) |
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