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National Stock Number:
5305-01-622-9665
Federal Supply Class:
5305
National Item Identification Number:
016229665
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:
| NAS1142E9 | 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 | UNJC | | NOMINAL THREAD DIAMETER | 0.1640 INCHES | | THREAD QUANTITY PER INCH | 32 | | THREAD CLASS | 3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.276 INCHES NOMINAL | | FASTENER LENGTH | 0.823 INCHES MINIMUM AND | | 0.853 INCHES MAXIMUM | | MATERIAL | IRON ALLOY 660 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS5731,5732,5737 OR 5853 NATIONAL STD/SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | CLEAN/PASSIVATE IAW QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | HEAD STYLE | PAN | | HEAD DIAMETER | 0.309 INCHES MINIMUM AND | | 0.331 INCHES MAXIMUM | | HEAD HEIGHT | 0.088 INCHES MINIMUM AND | | 0.102 INCHES MAXIMUM | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | GRIP LENGTH | 0.552 INCHES MINIMUM AND | | 0.572 INCHES MAXIMUM | | GRIP DIAMETER | 0.1625 INCHES MINIMUM AND | | 0.1635 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES BEARING SURFACE OF HEAD | | 32.0 MICROINCHES GRIP | | 32.0 MICROINCHES THREADS | | SPECIFICATION/STANDARD DATA | 80205-NAS1141 THRU 1148 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,MACHINE,PAN HEAD,MODIFIED,CLOSE TOLERANCE,SHORT THREAD,OFFSET CRUCIFORM |
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