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National Stock Number:
5305-01-456-0720
Federal Supply Class:
5305
National Item Identification Number:
014560720
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:
| NAS7403D5 | 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 | 0.323 INCHES NOMINAL | | FASTENER LENGTH | 0.620 INCHES MINIMUM AND | | 0.650 INCHES MAXIMUM | | MATERIAL | IRON ALLOY 660 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | AMS 5731 ASSN STD SINGLE MATERIAL RESPONSE OR | | AMS 5737 ASSN STD SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND | | CHROMATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416,TY2, CL2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | HEAD STYLE | PAN | | HEAD DIAMETER | 0.367 INCHES MINIMUM AND | | 0.373 INCHES MAXIMUM | | HEAD HEIGHT | 0.122 INCHES MINIMUM AND | | 0.133 INCHES MAXIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | CROSS RECESS TYPE 1 | | GRIP LENGTH | 0.302 INCHES MINIMUM AND | | 0.322 INCHES MAXIMUM | | GRIP DIAMETER | 0.1885 INCHES MINIMUM AND | | 0.1890 INCHES MAXIMUM | | DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.461 INCHES MINIMUM AND | | 0.481 INCHES MAXIMUM FIRST HOLE | | SHANK UNTHREADED HOLE DIAMETER | 0.070 INCHES MINIMUM AND | | 0.080 INCHES MAXIMUM FIRST HOLE | | SPECIFICATION/STANDARD DATA | 80205-4703 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
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