|
|
|
National Stock Number:
5305-01-521-5145
Federal Supply Class:
5305
National Item Identification Number:
015215145
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.
|
Manufacturer Information:
| BACS12HW3AU8 | 06725 | SPS TECHNOLOGIES, LLC | | BACS12HW3AU8 | 0ZC92 | HEARTLAND PRECISION FASTENERS INC | | BACS12HW3AU8 | 1GP79 | PILGRIM SCREW CORP | | BACS12HW3AU8 | 81205 | THE BOEING COMPANY |
|
Techincal Specification:
| CRITICALITY CODE JUSTIFICATION | AGAV | | FASTENER LENGTH | 0.761 INCHES MINIMUM AND 0.791 INCHES MAXIMUM | | GRIP DIAMETER | 0.1890 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM | | GRIP LENGTH | 0.490 INCHES MINIMUM AND 0.520 INCHES MAXIMUM | | HEAD DIAMETER | 0.357 INCHES MINIMUM AND 0.373 INCHES MAXIMUM | | HEAD HEIGHT | 0.122 INCHES MINIMUM AND 0.133 INCHES MAXIMUM | | HEAD STYLE | FLAT CHAMFER | | INTERNAL DRIVE STYLE | TORX | | LOCKING FEATURE | PREVAILING TORQUE ALL METAL DESIGN OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 A286 ASSN STD SINGLE MATERIAL RESPONSE OR AMS5732 A286 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5737 A286 ASSN STD SINGLE MATERIAL RESPONSE OR AMS 5853 A286 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | MATERIAL | IRON ALLOY 660 OVERALL | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, PAN HEAD, CLOSE TOLERANCE, SHORT THREAD, SIX LOBE | | SPECIAL FEATURES | PER ASME B46.1. "D" DIAMETER UNDERSIDE OF HEAD, ROOT OF THREADS AND THREAD FLANKS 32 MICROINCHES RA. ALL OTHER SURFACES, 125 MICROINCHES RA. | | SPLINE MAJOR DIAMETER | 0.154 INCHES MINIMUM AND 0.156 INCHES MAXIMUM | | SPLINE MINOR DIAMETER | 0.1105 INCHES MINIMUM AND 0.1205 INCHES MAXIMUM | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS-QQ-P-35, TYPE II OR VIII ASSN STD SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD LENGTH | 0.276 INCHES MINIMUM | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 32 |
|
|