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National Stock Number:
5305-01-626-4266
Federal Supply Class:
5305
National Item Identification Number:
016264266
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:
| AS292-3-12 | 84256 | AVIBANK MFG., INC. | | GB510CG | 26512 | NORTHROP GRUMMAN SYSTEMS CORPORATION | | GB510CG312 | 26512 | NORTHROP GRUMMAN SYSTEMS CORPORATION |
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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 | 0.356 INCHES MINIMUM AND | | 0.392 INCHES MAXIMUM | | FASTENER LENGTH | 1.122 INCHES MINIMUM AND | | 1.142 INCHES MAXIMUM | | MATERIAL | STEEL COMP XM-13 OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | MINIMUM TENSILE STRENGTH | 63000 POUNDS PER SQUARE INCH | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.328 INCHES MINIMUM AND | | 0.385 INCHES MAXIMUM | | COUNTERSINK ANGLE | 99.0 DEGREES MINIMUM AND | | 101.0 DEGREES MAXIMUM | | INTERNAL DRIVE STYLE | OFFSET CRUCIFORM (TORQUE SET) | | LOCKING FEATURE | DETENT BALL THREADS | | GRIP LENGTH | 0.750 INCHES MINIMUM AND | | 0.766 INCHES MAXIMUM | | GRIP DIAMETER | 0.188 INCHES MINIMUM AND | | 0.189 INCHES MAXIMUM | | SPECIAL FEATURES | INTERNAL DRIVE RIBBED |
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