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National Stock Number:
5305-01-621-7132
Federal Supply Class:
5305
National Item Identification Number:
016217132
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:
| CA2193-3-09 | 29372 | HOWMET GLOBAL FASTENING SYSTEMS INC. | | CA2193-3-09 | 58998 | FASTENER INNOVATION TECHNOLOGY, INC. | | LE111-0002-3009 | 43999 | THE BOEING 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 | 0.445 INCHES NOMINAL | | FASTENER LENGTH | 1.007 INCHES NOMINAL | | MATERIAL | IRON ALLOY 660 OVERALL | | SURFACE TREATMENT | PASSIVATE OVERALL | | MINIMUM TENSILE STRENGTH | 160000 POUNDS PER SQUARE INCH | | HEAD STYLE | FLAT COUNTERSUNK | | HEAD DIAMETER | 0.381 INCHES MAXIMUM | | COUNTERSINK ANGLE | 100.0 DEGREES NOMINAL | | INTERNAL DRIVE STYLE | HEXAGON | | WIDTH ACROSS FLATS | 0.125 INCHES MINIMUM AND | | 0.127 INCHES MAXIMUM | | GRIP LENGTH | 0.562 INCHES NOMINAL | | GRIP DIAMETER | 0.189 INCHES MINIMUM AND | | 0.190 INCHES MAXIMUM | | SPECIAL FEATURES | HOLE AT THREADED END REAMED FOR PRESS FIT WITH PLUG | | PART NAME ASSIGNED BY CONTROLLING AGENCY | STUD BOLT |
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