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National Stock Number:
5305-01-596-9640
Federal Supply Class:
5305
National Item Identification Number:
015969640
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:
| NAS1581C3H2P | 71379 | CESSNA AIRCRAFT COMPANY | | NAS1581C3H2P | 7EK50 | TEXTRON AVIATION INC | | NAS1581C3H2P | 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 | 0.363 INCHES NOMINAL | | FASTENER LENGTH | 0.472 INCHES MINIMUM AND | | 0.502 INCHES MAXIMUM | | MATERIAL | IRON ALLOY 660 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OR | | AMS 5732 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OR | | AMS 5737 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OR | | AMS 5853 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | AMS QQ-P-416, TY II, CL 2 NATIONAL STD/SPEC SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.258 INCHES MINIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | HIGH-TORQUE | | GRIP LENGTH | 0.115 INCHES MINIMUM AND | | 0.135 INCHES MAXIMUM | | GRIP DIAMETER | 0.188 INCHES MINIMUM AND | | 0.189 INCHES MAXIMUM |
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