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National Stock Number:
5305-01-327-5180
Federal Supply Class:
5305
National Item Identification Number:
013275180
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:
| BACB30EL6-5 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30EL6-5 | 80539 | SPS TECHNOLOGIES, LLC | | BACB30EL6-6 | 17446 | HUCK INTERNATIONAL, INC | | BACB30EL6-6 | 56878 | SPS TECHNOLOGIES, LLC | | BACB30EL6-5 | 81205 | THE BOEING COMPANY | | BACB30EL6-5 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30EL6-6 | 73197 | HI-SHEAR CORPORATION | | BACB30EL6-6 | 81205 | THE BOEING COMPANY | | BACB30EL6-6 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30EL6-6 | 97928 | HUCK INTL INC | | BACB30EL6-6 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 0.669 INCHES MINIMUM AND 0.699 INCHES MAXIMUM | | GRIP LENGTH | 0.283 INCHES MINIMUM AND 0.303 INCHES MAXIMUM | | GRIP DIAMETER | 0.3735 INCHES MINIMUM AND 0.3745 INCHES MAXIMUM | | HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL | | HEAD DIAMETER | 0.515 INCHES MINIMUM AND 0.566 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL | STEEL COMP 4130 OR STEEL COMP E4340 OR STEEL COMP 8735 OR STEEL COMP 8740 OR STEEL COMP 6150 OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.375 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,TY 2 CL 3 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND CHROMATE OVERALL | | THREAD CLASS | 3A | | THREAD LENGTH | 0.391 INCHES NOMINAL | | THREAD DIRECTION | RIGHT-HAND | | THREAD QUANTITY PER INCH | 24 | | THREAD SERIES DESIGNATOR | UNJF |
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