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National Stock Number:
5305-01-215-7282
Federal Supply Class:
5305
National Item Identification Number:
012157282
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:
| HT4054-3-18 | 17446 | HUCK INTERNATIONAL, INC | | HT4054-3-18 | 73197 | HI-SHEAR CORPORATION | | HT4054-3-18 | 80539 | SPS TECHNOLOGIES, LLC | | HT4054-3-18 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4054-3-18A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4054-3-18A | 17446 | HUCK INTERNATIONAL, INC | | HT4054-3-18A | 73197 | HI-SHEAR CORPORATION | | HT4054-3-18A | 80539 | SPS TECHNOLOGIES, LLC | | HT4054-3-18A | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4054-3-18A | 97928 | HUCK INTL INC | | HT4054-3-18A | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | ST3M730-3L18 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | ST3M730-3L18 | 60516 | WEST COAST AEROSPACE, INC. | | ST3M730-3L18 | 76301 | THE BOEING COMPANY | | ST3M730-3L18 | K5673 | SPS TECHNOLOGIES LTD TJ BROOKS DIVISION | | WC4054-3-18A | 60516 | WEST COAST AEROSPACE, INC. |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 1.448 INCHES MINIMUM AND 1.478 INCHES MAXIMUM | | GRIP DIAMETER | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM | | GRIP LENGTH | 1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM | | HARDNESS RATING | 39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL | | HEAD DIAMETER | 0.339 INCHES MINIMUM AND 0.381 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-6049 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP 8740 OVERALL | | MINIMUM TENSILE STRENGTH | 180000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-83488,TY2,CL3 MIL SPEC ALL TREATMENT RESPONSES OVERALL | | SURFACE TREATMENT | ALUMINUM AND CHROMATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.313 INCHES MINIMUM AND 0.363 INCHES MAXIMUM | | THREAD QUANTITY PER INCH | 32 | | THREAD SERIES DESIGNATOR | UNJF |
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