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National Stock Number:
5305-01-612-4758
Federal Supply Class:
5305
National Item Identification Number:
016124758
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:
| BACB30ZE4-7 | 06725 | SPS TECHNOLOGIES, LLC | | BACB30ZE4-7 | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30ZE4-7 | 1RC86 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30ZE4-7 | 27624 | SPS TECHNOLOGIES LLC | | BACB30ZE4-7 | 56878 | SPS TECHNOLOGIES, LLC | | BACB30ZE4-7 | 73197 | HI-SHEAR CORPORATION | | NAS8704-7 | 80205 | NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE | | BACB30ZE4-7 | 81205 | THE BOEING COMPANY |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJC | | NOMINAL THREAD DIAMETER | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.370 INCHES NOMINAL | | FASTENER LENGTH | 0.8075 INCHES NOMINAL | | MATERIAL | IRON ALLOY 660 OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | SINGLE SHEAR STRENGTH | 95000 POUNDS PER SQUARE INCH | | HEAD STYLE | PAN | | HEAD DIAMETER | 0.355 INCHES MINIMUM AND | | 0.397 INCHES MAXIMUM | | HEAD HEIGHT | 0.014 INCHES MAXIMUM | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE II | | GRIP LENGTH | 0.4375 INCHES NOMINAL | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM | | SPECIAL FEATURES | CLOSE TOLERANCE |
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