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National Stock Number:
5305-01-164-5543
Federal Supply Class:
5305
National Item Identification Number:
011645543
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:
| 10115493 | A486G | NIMIKKEISTOKESKUS NCB FINLAND | | HT4054-4D23 | 73197 | HI-SHEAR CORPORATION | | HT4054-4D23A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4054-4D23A | 0PTK6 | SPS TECHNOLOGIES INC | | HT4054-4D23A | 17446 | HUCK INTERNATIONAL, INC | | HT4054-4D23A | 73197 | HI-SHEAR CORPORATION | | ST3M730-4DL23 | 1VSL7 | HOUSTON PRECISION FASTENERS I LP | | ST3M730-4DL23 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | ST3M730-4DL23 | 76301 | THE BOEING COMPANY | | HT4054-4D23A | 80539 | SPS TECHNOLOGIES, LLC | | HT4054-4D23A | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4054-4D23A | 97928 | HUCK INTL INC | | HT4054-4D23A | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION | | HT4054-4D23A | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | WC4054-4D23 | 60516 | WEST COAST AEROSPACE, INC. | | WC4054-4D23A | 60516 | WEST COAST AEROSPACE, INC. |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.425 INCHES NOMINAL | | FASTENER LENGTH | 1.847 INCHES MINIMUM AND | | 1.877 INCHES MAXIMUM | | MATERIAL | STEEL COMP XM-13 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH | | HEAD STYLE | OVAL COUNTERSUNK | | HEAD DIAMETER | 0.397 INCHES NOMINAL | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 1.427 INCHES MINIMUM AND | | 1.447 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | 32.0 MICROINCHES GRIP | | 32.0 MICROINCHES THREADS | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 1.736 INCHES MINIMUM AND | | 1.756 INCHES MAXIMUM FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND | | 0.086 INCHES MAXIMUM FIRST HOLE | | FEATURES PROVIDED | CETYL ALCOHOL LUBRICANT |
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