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National Stock Number:
5305-01-520-9384
Federal Supply Class:
5305
National Item Identification Number:
015209384
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:
| 120-259V3A5 | 97499 | BELL TEXTRON INC | | NAS5314V3A5 | 80205 | NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE |
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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 | 0.260 INCHES NOMINAL | | FASTENER LENGTH | 0.715 INCHES NOMINAL | | MATERIAL | TITANIUM ALLOY UNS R54520 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 4928 FED SPEC 1ST MATERIAL RESPONSE OR | | AMS 4967 FED SPEC 2ND MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PAINT AND | | LUBRICANT OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | NAS4006 ASSN STD 1ST TREATMENT RESPONSE AND | | CETYL ALCOHOL LUBRICANT PER MIL-L-87132, TYPE 3, GRADE B MIL SPEC 2ND TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 3180 POUNDS PER SQUARE INCH | | HEAD STYLE | UNDERCUT PAN NO. 2 | | HEAD DIAMETER | 0.547 INCHES NOMINAL | | HEAD HEIGHT | 0.127 INCHES NOMINAL | | INTERNAL DRIVE STYLE | TORX | | SPLINE MAJOR DIAMETER | 0.155 INCHES NOMINAL | | GRIP LENGTH | 0.312 INCHES NOMINAL | | GRIP DIAMETER | 0.189 INCHES NOMINAL | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW, SHEAR, PAN HEAD, CLOSE TOLERANCE, SHORT THREAD, SIX LOBE RECESS, 95 KSI FSU |
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