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National Stock Number:
5305-00-061-9127
Federal Supply Class:
5305
National Item Identification Number:
000619127
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:
| AS104-04-7 | 84256 | AVIBANK MFG., INC. | | CA2730-4-7 | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. | | CC00035-4-7 | 81755 | LOCKHEED MARTIN CORPORATION |
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Techincal Specification:
| DISTANCE FROM HEAD LARGEST BEARING SURFACE TO SHANK HOLE CENTER | 0.557 INCHES NOMINAL FIRST HOLE | | FASTENER LENGTH | 0.896 INCHES NOMINAL | | GRIP DIAMETER | 0.2487 INCHES MINIMUM AND 0.2492 INCHES MAXIMUM | | GRIP LENGTH | 0.438 INCHES MINIMUM AND 0.458 INCHES MAXIMUM | | HEAD DIAMETER | 0.3737 INCHES MINIMUM AND 0.3742 INCHES MAXIMUM | | HEAD HEIGHT | 0.253 INCHES MINIMUM AND 0.273 INCHES MAXIMUM | | HEAD STYLE | FLAT CHAMFER | | SHANK UNTHREADED HOLE DIAMETER | 0.076 INCHES MINIMUM AND 0.086 INCHES MAXIMUM FIRST HOLE | | SPECIAL FEATURES | RETAINING ELEMENTS IN SHANK | | WIDTH ACROSS FLATS | 0.1875 INCHES MINIMUM AND 0.1900 INCHES MAXIMUM | | SURFACE FINISH | 32.0 MICROINCHES OVERALL | | THREAD CLASS | 3A | | THREAD LENGTH | 0.290 INCHES NOMINAL |
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