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National Stock Number:
5305-01-247-7610
Federal Supply Class:
5305
National Item Identification Number:
012477610
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:
| BACB30RF8-17 | 17446 | HUCK INTERNATIONAL, INC | | BACB30RF8-17 | 56878 | SPS TECHNOLOGIES, LLC | | BACB30RF8-17 | 73197 | HI-SHEAR CORPORATION | | BACB30RF8-17 | 80539 | SPS TECHNOLOGIES, LLC | | BACB30RF8-17 | 81205 | THE BOEING COMPANY | | BACB30RF8-17 | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC | | BACB30RF8-17 | 97928 | HUCK INTL INC | | BACB30RF8-17 | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJF | | NOMINAL THREAD DIAMETER | 0.500 INCHES | | THREAD QUANTITY PER INCH | 20 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.541 INCHES NOMINAL | | FASTENER LENGTH | 1.5885 INCHES MINIMUM AND | | 1.6185 INCHES MAXIMUM | | MATERIAL | STEEL COMP XM-13 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-35 CLASS 125SC6 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.688 INCHES MINIMUM AND | | 0.756 INCHES MAXIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 1.0525 INCHES MINIMUM AND | | 1.0725 INCHES MAXIMUM | | GRIP DIAMETER | 0.4990 INCHES MINIMUM |
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