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National Stock Number:
5305-01-388-9086
Federal Supply Class:
5305
National Item Identification Number:
013889086
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:
| 1451M12P06 | 07482 | GENERAL ELECTRIC COMPANY |
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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 | 0.273 INCHES NOMINAL | | FASTENER LENGTH | 0.300 INCHES MINIMUM AND | | 0.320 INCHES MAXIMUM | | MATERIAL | NICKEL ALLOY 718 OVERALL | | HEAD STYLE | ROOF | | HEAD DIAMETER | 0.614 INCHES MINIMUM AND | | 0.639 INCHES MAXIMUM | | HEAD HEIGHT | 0.080 INCHES MINIMUM AND | | 0.085 INCHES MAXIMUM | | INTERNAL DRIVE STYLE | TORX | | SPLINE MAJOR DIAMETER | 0.155 INCHES NOMINAL | | GRIP LENGTH | 0.027 INCHES MINIMUM AND | | 0.047 INCHES MAXIMUM | | GRIP DIAMETER | 0.1885 INCHES MINIMUM AND | | 0.1895 INCHES MAXIMUM |
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