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National Stock Number:
5305-01-605-5456
Federal Supply Class:
5305
National Item Identification Number:
016055456
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:
| NAS5310V4A5 | 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 | 0.250 INCHES | | THREAD QUANTITY PER INCH | 28 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.403 INCHES NOMINAL | | FASTENER LENGTH | 0.715 INCHES NOMINAL | | MATERIAL | TITANIUM ALLOY UNS R56400 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | 6AL-4V IAW AMS4928 OR AMS4967 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.4421 INCHES MINIMUM AND | | 0.5260 INCHES MAXIMUM | | COUNTERSINK ANGLE | 129.0 DEGREES MINIMUM AND | | 131.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | TORX | | SPLINE MAJOR DIAMETER | 0.155 INCHES NOMINAL | | GRIP LENGTH | 0.312 INCHES NOMINAL | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM | | SURFACE FINISH | 125.0 MICROINCHES GRIP | | POINT STYLE | FLAT | | POINT DIAMETER | 0.240 INCHES NOMINAL | | SPECIAL FEATURES | ITEM FURNISHED W/ALUMINUM PIGMENTED COATING IAW NAS4006 W/CETYL ALCOHOL LUBRICANT IAW AS87132,TY III,GR B | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,SHEAR,130 DEG FLUSH HEAD,CLOSE TOLERANCE,NAS1800 SIX LOBE RECESS,95 KSI FSU |
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