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National Stock Number:
5305-01-520-9371
Federal Supply Class:
5305
National Item Identification Number:
015209371
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:
| 120-259E3-1 | 97499 | BELL TEXTRON INC | | NAS5314E3-1 | 97499 | BELL TEXTRON INC |
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Techincal Specification:
| CRITICALITY CODE JUSTIFICATION | AGAV | | FASTENER LENGTH | 0.465 INCHES NOMINAL | | GRIP DIAMETER | 0.189 INCHES NOMINAL | | GRIP LENGTH | 0.062 INCHES NOMINAL | | HEAD DIAMETER | 0.547 INCHES NOMINAL | | HEAD HEIGHT | 0.127 INCHES NOMINAL | | HEAD STYLE | UNDERCUT PAN NO. 2 | | INTERNAL DRIVE STYLE | TORX | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 FED SPEC 1ST MATERIAL RESPONSE OR AMS5732 FED SPEC 2ND MATERIAL RESPONSE OR AMS5737 FED SPEC 3RD MATERIAL RESPONSE OR AMS5853 FED SPEC 4TH MATERIAL RESPONSE OVERALL | | MATERIAL | IRON ALLOY 660 OVERALL | | MINIMUM TENSILE STRENGTH | 3180 POUNDS PER SQUARE INCH | | NOMINAL THREAD DIAMETER | 0.190 INCHES | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, SHEAR, PAN HEAD, CLOSE TOLERANCE, SHORT THREAD, SIX LOBE RECESS, 95 KSI FSU | | SPLINE MAJOR DIAMETER | 0.155 INCHES NOMINAL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | THREAD LENGTH | 0.260 INCHES NOMINAL | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD SERIES DESIGNATOR | UNJF | | THREAD QUANTITY PER INCH | 32 |
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