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National Stock Number:
5305-01-324-8861
Federal Supply Class:
5305
National Item Identification Number:
013248861
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:
| 124894-3-12F | 80539 | SPS TECHNOLOGIES, LLC | | 3M939-3-12F | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | AIC1147-3-12P | 06725 | SPS TECHNOLOGIES, LLC | | 3M939-3-12F | 1EM77 | B & B SPECIALTIES INC | | 3M939-3-12F | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | 3M939-3-12F | 76301 | THE BOEING COMPANY | | AIC1165-3-12P | 06725 | SPS TECHNOLOGIES, LLC | | AIC939-3-12P | 06725 | SPS TECHNOLOGIES, LLC | | SC5087-3-12P | 06950 | HOWMET GLOBAL FASTENING SYSTEMS INC | | GS1018-3-12F | 1EM77 | B & B SPECIALTIES INC | | ST3M939-3-12F | 58845 | ABOUNDING SECURITY INC DIV OF MAA CORP | | MA6939-3-12F | 58845 | ABOUNDING SECURITY INC DIV OF MAA CORP | | HR248-3-12BJ | 73197 | HI-SHEAR CORPORATION | | HR248-3-12BJ | L4528 | LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC | | WC939-3-12F | 60516 | WEST COAST AEROSPACE, INC. | | ST3M939-3-12F | 76301 | THE BOEING COMPANY | | VT1730-3-12P | 92215 | HOWMET GLOBAL FASTENING SYSTEMS INC |
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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 | 0.406 INCHES NOMINAL | | FASTENER LENGTH | 1.141 INCHES MINIMUM AND | | 1.171 INCHES MAXIMUM | | MATERIAL | NICKEL ALLOY 718 OVERALL | | SURFACE TREATMENT | ALUMINUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | MIL-C-83488 MIL SPEC SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 125000 POUNDS PER SQUARE INCH | | HEAD STYLE | OVAL COUNTERSUNK | | HEAD DIAMETER | 0.2996 INCHES MINIMUM AND | | 0.3016 INCHES MAXIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | GRIP LENGTH | 0.740 INCHES MINIMUM AND | | 0.760 INCHES MAXIMUM | | GRIP DIAMETER | 0.1885 INCHES MINIMUM AND | | 0.1895 INCHES MAXIMUM | | FEATURES PROVIDED | CETYL ALCOHOL LUBRICANT | | SPECIAL FEATURES | CETYL ALCOHOL PER MIL-L-87132 TY 1,GR B |
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