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National Stock Number:
5305-01-521-6403
Federal Supply Class:
5305
National Item Identification Number:
015216403
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:
| 3B1170C3-20A | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | 3M1170C3-20A | 76301 | THE BOEING COMPANY | | TX1027C3-20A | 06725 | SPS TECHNOLOGIES, LLC | | TX1027C3-20A | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | TX1027C3-20A | 0PTK6 | SPS TECHNOLOGIES INC | | TX1027C3-20A | 27624 | SPS TECHNOLOGIES LLC | | TX1027C3-20A | 56878 | SPS TECHNOLOGIES, LLC | | TX1027C3-20A | 73197 | HI-SHEAR CORPORATION | | TX1027C3-20A | 80539 | SPS TECHNOLOGIES, LLC | | TX1027C3-20A | C4293 | ALCOA FASTENING SYSTEMS FAIRCHILDFASTENERS EUROPE - VSD GMBH | | TX1027C3-20A | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| COUNTERSINK ANGLE | 99.0 DEGREES NOMINAL AND 101.0 DEGREES MAXIMUM | | FASTENER LENGTH | 1.580 INCHES MINIMUM AND 1.610 INCHES MAXIMUM | | GRIP DIAMETER | 0.189 INCHES NOMINAL | | GRIP LENGTH | 1.240 INCHES MINIMUM AND 1.260 INCHES MAXIMUM | | HEAD DIAMETER | 0.2931 INCHES MINIMUM AND 0.3016 INCHES MAXIMUM | | HEAD STYLE | FLAT COUNTERSUNK | | INTERNAL DRIVE STYLE | TORX | | PART NAME ASSIGNED BY CONTROLLING AGENCY | BOLT, 100 DEGREE REDUCED HEAD, GEAR DRIVE RECESS | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5662 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | NICKEL ALLOY 718 OVERALL | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | SPECIAL FEATURES | 125 KSI SHEAR STRENGTH | | POINT STYLE | FLAT | | POINT DIAMETER | 0.345 INCHES NOMINAL | | SPLINE MAJOR DIAMETER | 0.154 INCHES MINIMUM AND 0.156 INCHES MAXIMUM | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.340 INCHES MINIMUM AND 0.350 INCHES MAXIMUM | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 32 |
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