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National Stock Number:
5305-00-601-8271
Federal Supply Class:
5305
National Item Identification Number:
006018271
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:
| 3MA583-6T | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | 3MA583-6T | 17446 | HUCK INTERNATIONAL, INC | | 3MA583-6T | 1DN91 | STANDARD AERO PARTS, INC | | 3MA583-6T | 73197 | HI-SHEAR CORPORATION | | 3MA583-6T | 76301 | THE BOEING COMPANY | | 3MA583-6T | 80539 | SPS TECHNOLOGIES, LLC | | 3MFR583-6T | 76301 | THE BOEING COMPANY | | 3MA583-6T | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | 3MA583-6T | 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 | 0.765 INCHES MINIMUM AND 0.812 INCHES MAXIMUM | | GRIP LENGTH | 0.365 INCHES MINIMUM AND 0.385 INCHES MAXIMUM | | GRIP DIAMETER | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM | | HARDNESS RATING | 36.0 ROCKWELL C MINIMUM AND 40.0 ROCKWELL C MAXIMUM OVERALL | | HEAD DIAMETER | 0.3765 INCHES MINIMUM AND 0.3813 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL | STEEL COMP 4140 OR STEEL COMP E4340 OR STEEL COMP 6150 OR STEEL COMP 8735 OR STEEL COMP 8740 OR STEEL COMP 4130 OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | SURFACE FINISH | 125.0 MICROINCHES BEARING SURFACE OF HEAD | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | SURFACE FINISH | 32.0 MICROINCHES TOP OF HEAD | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TYPE 2 CLASS 3 FED SPEC 1ST TREATMENT RESPONSE AND PS 13421 FSCM 76301 MFR REF 2ND TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND PAINT OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.380 INCHES MINIMUM AND 0.447 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 32 |
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