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National Stock Number:
5305-00-435-8993
Federal Supply Class:
5305
National Item Identification Number:
004358993
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:
| 202-15503-3-4 | 16258 | SPACE-LOK, INC. | | 202-15503-3-4 | 80378 | TRIUMPH AEROSTRUCTURES, LLC | | CA27034-3-4 | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. | | AS146S3-4 | 84256 | AVIBANK MFG., INC. |
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Techincal Specification:
| FASTENER LENGTH | 0.744 INCHES MINIMUM AND 0.764 INCHES MAXIMUM | | LOCKING FEATURE | DETENT BALL HEAD | | SPECIAL FEATURES | LOCKING DEVICE RELEASE LOCATED IN HEAD OF SCREW | | SURFACE FINISH | 32.0 MICROINCHES GRIP | | SURFACE FINISH | 32.0 MICROINCHES THREADS | | THREAD CLASS | 3A | | THREAD LENGTH | 0.388 INCHES MINIMUM AND 0.424 INCHES MAXIMUM |
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