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National Stock Number:
5305-01-197-1309
Federal Supply Class:
5305
National Item Identification Number:
011971309
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:
| 3M123-4-5 | 76301 | THE BOEING COMPANY | | 54291-4-5 | 0PTK6 | SPS TECHNOLOGIES INC | | E128-4-5 | 17446 | HUCK INTERNATIONAL, INC | | 54291-4-5 | 56878 | SPS TECHNOLOGIES, LLC | | 54291-4-5 | 80539 | SPS TECHNOLOGIES, LLC | | E128-4-5 | 97928 | HUCK INTL INC | | HT1029A-4-5 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT1029A4-5 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT123-4-5 | 17446 | HUCK INTERNATIONAL, INC | | HT4N-5 | 73197 | HI-SHEAR CORPORATION | | HT1029A-4-5 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT123-4-5 | 97928 | HUCK INTL INC | | HT4N-5 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | FASTENER LENGTH | 0.765 INCHES MINIMUM AND 0.812 INCHES MAXIMUM | | GRIP DIAMETER | 0.2490 INCHES MINIMUM AND 0.2495 INCHES MAXIMUM | | GRIP LENGTH | 0.302 INCHES MINIMUM AND 0.322 INCHES MAXIMUM | | HARDNESS RATING | 24.0 ROCKWELL C MINIMUM AND 44.0 ROCKWELL C MAXIMUM OVERALL | | HEAD DIAMETER | 0.502 INCHES MINIMUM AND 0.507 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | MATERIAL | IRON ALLOY 660 OVERALL | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD DIRECTION | RIGHT-HAND | | THREAD CLASS | 3A | | THREAD LENGTH | 0.443 INCHES MINIMUM AND 0.510 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNF | | THREAD QUANTITY PER INCH | 28 |
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