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National Stock Number:
5305-01-062-3348
Federal Supply Class:
5305
National Item Identification Number:
010623348
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:
| BACB30RF5P40 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30RF5P40 | 17446 | HUCK INTERNATIONAL, INC | | BACB30RF5P40 | 27624 | SPS TECHNOLOGIES LLC | | BACB30RF5P40 | 56878 | SPS TECHNOLOGIES, LLC | | BACB30RF5P40 | 73197 | HI-SHEAR CORPORATION | | BACB30RF5P40 | 81205 | THE BOEING COMPANY | | BACB30UW5P40 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30UW5P40 | 1RC86 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30UW5P40 | 27624 | SPS TECHNOLOGIES LLC | | BACB30UW5P40 | 56878 | SPS TECHNOLOGIES, LLC | | BACB30UW5P40 | 73197 | HI-SHEAR CORPORATION | | BACB30UW5P40 | 81205 | THE BOEING COMPANY | | BACB30UW5P40 | 97928 | HUCK INTL INC | | BACB30UW5P40 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | FASTENER LENGTH | 2.939 INCHES MINIMUM AND 2.969 INCHES MAXIMUM | | GRIP DIAMETER | 0.3110 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM | | GRIP LENGTH | 2.490 INCHES MINIMUM AND 2.510 INCHES MAXIMUM | | HEAD DIAMETER | 0.428 INCHES MINIMUM AND 0.479 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL | NICKEL ALLOY 718 OVERALL | | NOMINAL THREAD DIAMETER | 0.312 INCHES | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TY2CL2 ALUMINUM PIGMENTED COATING FED SPEC 1ST TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.429 INCHES MINIMUM AND 0.479 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 24 |
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