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National Stock Number:
5305-01-383-3740
Federal Supply Class:
5305
National Item Identification Number:
013833740
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:
| NAS1154-17D | 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 | A3A | | THREAD DIRECTION | RIGHT-HAND | | THREAD LENGTH | 0.316 INCHES NOMINAL | | FASTENER LENGTH | 1.378 INCHES NOMINAL | | MATERIAL | STEEL COMP 4140 OVERALL | | MATERIAL DOCUMENT AND CLASSIFICATION | MIL-S-5626 MIL SPEC SINGLE MATERIAL RESPONSE OVERALL | | SURFACE TREATMENT | CADMIUM AND | | CHROMATE OVERALL | | SURFACE TREATMENT DOCUMENT AND CLASSIFICATION | QQ-P-416 TY 2 FED SPEC SINGLE TREATMENT RESPONSE OVERALL | | MINIMUM TENSILE STRENGTH | 5820 POUNDS PER SQUARE INCH | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.497 INCHES MINIMUM AND | | 0.507 INCHES MAXIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MAXIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | HOLE CONFIGURATION STYLE | ROUND | | HOLE TYPE | DRILLED | | HOLE QUANTITY | 1 | | HOLE DIAMETER | 0.076 INCHES NOMINAL | | GRIP LENGTH | 1.052 INCHES MINIMUM AND | | 1.072 INCHES MAXIMUM | | GRIP DIAMETER | 0.2485 INCHES MINIMUM AND | | 0.2495 INCHES MAXIMUM | | SPECIFICATION/STANDARD DATA | 80205-NAS1154 PROFESSIONAL/INDUSTRIAL ASSOCIATION STANDARD |
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