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National Stock Number:
5305-01-298-1300
Federal Supply Class:
5305
National Item Identification Number:
012981300
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:
| 121557-3-16B | 80539 | SPS TECHNOLOGIES, LLC | | 121557-3-A16B | 56878 | SPS TECHNOLOGIES, LLC | | AIC984B3-16 | 06725 | SPS TECHNOLOGIES, LLC | | C7984B3-16 | 17446 | HUCK INTERNATIONAL, INC | | 121557-3-A16B | 80539 | SPS TECHNOLOGIES, LLC | | 5305PL0784891 | 9009H | INSPEKTORAT WSPARCIA SIL ZBROJNYCH | | VT1693AS3-16 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | H044B3-16 | 17446 | HUCK INTERNATIONAL, INC | | PBF1165B3-16 | 27624 | SPS TECHNOLOGIES LLC | | C7984B3-16 | 81755 | LOCKHEED MARTIN CORPORATION | | VT1693AS3-16 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | H044B3-16 | 97928 | HUCK INTL INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 1.308 INCHES MINIMUM AND 1.338 INCHES MAXIMUM | | FEATURES PROVIDED | DRY FILM LUBRICANT | | GRIP DIAMETER | 0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM | | GRIP LENGTH | 0.990 INCHES MINIMUM AND 1.010 INCHES MAXIMUM | | HARDNESS RATING | 46.0 ROCKWELL C MINIMUM AND 50.0 ROCKWELL C MAXIMUM OVERALL | | HEAD DIAMETER | 0.325 INCHES MINIMUM AND 0.385 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 6487 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | STEEL COMP H11 OVERALL | | MINIMUM TENSILE STRENGTH | 220000 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.190 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 | MIL-C-83488 TY 2 CL 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | ALUMINUM AND CHROMATE OVERALL | | THREAD CLASS | 3A | | THREAD LENGTH | 0.298 INCHES MINIMUM AND 0.348 INCHES MAXIMUM | | THREAD DIRECTION | RIGHT-HAND | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 32 |
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