5355-00-038-1911 KNOB Index 5306-00-038-1940 BOLT,MACHINE

National Stock Number:
5305-00-038-1918

Federal Supply Class:
5305

National Item Identification Number:
000381918

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.


Manufacturer Information:
51B221-2806725SPS TECHNOLOGIES, LLC
51B221-2806950HOWMET GLOBAL FASTENING SYSTEMS INC
51B221-2827624SPS TECHNOLOGIES LLC
51B221-2873197HI-SHEAR CORPORATION
51B221-2876823NORTHROP GRUMMAN SYSTEMS CORPORATION
51B221-2880539SPS TECHNOLOGIES, LLC
51B221-2892215HOWMET GLOBAL FASTENING SYSTEMS INC
51B221-2897928HUCK INTL INC
51B221-28L4528LISI AEROSPACE CANADA CORP DIV HI SHEAR HOLDINGS INC


Techincal Specification:
FASTENER LENGTH2.011 INCHES MINIMUM AND 2.058 INCHES MAXIMUM
GRIP DIAMETER0.1885 INCHES MINIMUM AND 0.1895 INCHES MAXIMUM
GRIP LENGTH1.735 INCHES MINIMUM AND 1.765 INCHES MAXIMUM
HARDNESS RATING39.0 ROCKWELL C MINIMUM AND 43.0 ROCKWELL C MAXIMUM OVERALL
HEAD HEIGHT0.103 INCHES MINIMUM AND 0.118 INCHES MAXIMUM
HEAD DIAMETER0.361 INCHES MINIMUM AND 0.381 INCHES MAXIMUM
HEAD STYLEPAN
INTERNAL DRIVE STYLEOFFSET CRUCIFORM (TORQUE SET)
MATERIALSTEEL COMP 4340 OR STEEL COMP 4140 OR STEEL COMP 8740 OVERALL
MINIMUM TENSILE STRENGTH180000 POUNDS PER SQUARE INCH
NOMINAL THREAD DIAMETER0.190 INCHES
SURFACE FINISH32.0 MICROINCHES GRIP
SURFACE TREATMENT DOCUMENT AND CLASSIFICATIONQQ-P-416,TYPE 2 CLASS 2 FED SPEC ALL TREATMENT RESPONSES OVERALL
SURFACE TREATMENTCADMIUM AND CHROMATE OVERALL
THREAD CLASS3A
THREAD DIRECTIONRIGHT-HAND
THREAD LENGTH0.246 INCHES MINIMUM AND 0.323 INCHES MAXIMUM
THREAD QUANTITY PER INCH32
THREAD SERIES DESIGNATORUNIFIED NATIONAL JOINT FINE (UNJF)


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