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National Stock Number:
5305-01-386-3716
Federal Supply Class:
5305
National Item Identification Number:
013863716
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:
| NAS1151-6 | 80205 | NATIONAL AEROSPACE STANDARDS COMMITTEE AEROSPACE INDUSTRIES ASSOCIATION OF AMERICA INC NOT FOR RFQ OR SOLICITATION USE |
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Techincal Specification:
| GRIP DIAMETER | 0.375 INCHES NOMINAL | | GRIP LENGTH | 0.651 INCHES NOMINAL | | NOMINAL THREAD DIAMETER | 0.138 INCHES | | SPECIAL FEATURES | MACHINE-FLAT 100 DEG HEAD; SHORT THREAD; TORQ-SET; ALLOY STEEL; CADMIUM PLATED PER QQ-P-416, TYPE II, CLASS 2; 160,000 TO 180,000 PSI UTS; SHALL BE IN ACCORDANCE WITH ALL REQUIREMENTS AS SPECIFIED IN NATIONAL AEROSPACE STANDARD NAS1151 THRU 1158 | | THREAD CLASS | 3A | | THREAD LENGTH | 0.276 INCHES NOMINAL | | THREAD QUANTITY PER INCH | 32 | | THREAD SERIES DESIGNATOR | UNJC |
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