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National Stock Number:
5305-01-610-9529
Federal Supply Class:
5305
National Item Identification Number:
016109529
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:
| 120-225C08R08 | 97499 | BELL TEXTRON INC |
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Techincal Specification:
| THREAD SERIES DESIGNATOR | UNJC | | THREAD DIRECTION | RIGHT-HAND | | FASTENER LENGTH | 0.516 INCHES MINIMUM AND | | 0.563 INCHES MAXIMUM | | MATERIAL | STEEL CORROSION RESISTING FASTENER | | HEAD STYLE | ROUND EXTENDED WASHER | | HEAD DIAMETER | 0.312 INCHES NOMINAL | | HEAD HEIGHT | 0.082 INCHES MINIMUM AND | | 0.092 INCHES MAXIMUM | | EXTENDED WASHER DIAMETER | 0.375 INCHES NOMINAL | | EXTENDED WASHER THICKNESS | 0.023 INCHES MINIMUM AND | | 0.028 INCHES MAXIMUM | | GRIP LENGTH | 0.079 INCHES MINIMUM AND | | 0.109 INCHES MAXIMUM | | SPECIAL FEATURES | RIBBED CRUCIFORM RECESS PER NAS7100 | | PART NAME ASSIGNED BY CONTROLLING AGENCY | SCREW,WASHER HEAD,CLOSE TOLERANCE,LONG THREAD, 95 KSI FSU |
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