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National Stock Number:
5305-01-626-8204
Federal Supply Class:
5305
National Item Identification Number:
016268204
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:
| 3M938-3-7-5 | 76301 | THE BOEING COMPANY | | HT4072-3-7-5 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | HT4072-3-7-5 | 17446 | HUCK INTERNATIONAL, INC | | HT4072-3-7-5 | 73197 | HI-SHEAR CORPORATION | | HT4072-3-7-5 | 80539 | SPS TECHNOLOGIES, LLC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.1900 INCHES | | THREAD QUANTITY PER INCH | 32 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.312 INCHES NOMINAL | | FASTENER LENGTH | 0.750 INCHES NOMINAL | | MATERIAL | STEEL COMP XM-13 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5629 FED SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | ALUMINUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-83488, TYPE II, CLASS 3 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | OVAL COUNTERSUNK UNDERCUT | | HEAD DIAMETER | 0.2966 INCHES MINIMUM AND | | 0.3016 INCHES MAXIMUM | | HEAD HEIGHT | 0.056 INCHES MINIMUM AND | | 0.060 INCHES MAXIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 0.438 INCHES NOMINAL | | GRIP DIAMETER | 0.1885 INCHES MINIMUM AND | | 0.1895 INCHES MAXIMUM | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.629 INCHES MINIMUM AND | | 0.639 INCHES MAXIMUM OVERALL | | SHANK UNTHREADED HOLE DIAMETER | 0.070 INCHES MINIMUM AND | | 0.075 INCHES MAXIMUM OVERALL | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, MACHINE, 100 DEG C'SUNK, HI-TORQUE, REDUCED HEAD |
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