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National Stock Number:
5305-01-602-4172
Federal Supply Class:
5305
National Item Identification Number:
016024172
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:
| BACB30LH3-11 | 81205 | THE BOEING COMPANY |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | THREAD QUANTITY PER INCH | 32 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.345 INCHES NOMINAL | | FASTENER LENGTH | 0.682 INCHES NOMINAL | | MATERIAL | IRON ALLOY 660 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AAMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416, TYPE II, CLASS 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 95000 POUNDS PER SQUARE INCH | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.383 INCHES NOMINAL | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 | | GRIP LENGTH | 0.337 INCHES NOMINAL | | GRIP DIAMETER | 0.1885 INCHES MINIMUM | | POINT STYLE | FLAT | | POINT DIAMETER | 0.181 INCHES MINIMUM AND | | 0.184 INCHES MAXIMUM | | SPECIAL FEATURES | ITEM IS FAA CERTIFIED |
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