BOLT
P/N ST3M744-6D15
P/N S406-6D15
P/N MB154-6D15
P/N VCG0001-6D15
NSN 5306-01-173-0334
MFG BOEING COMPANY
 
NEW GOV SURPLUS
 
ITEM NAME  BOLT,CLOSE TOLERANC
DEFINITION  An externally threaded fastener whose unthreaded portion is of a
             specified grip length, plated or unplated, and is machined to a
             tolerance of one thousandth (0.001) of an inch (0.025 mm) or less of a
             specific diameter for items one inch (25 mm) or less in diameter.
             Items over one inch (25 mm) in diameter shall have a tolerance of
             fifteen ten-thousandths (0.0015) of an inch (0.038 mm) or less. The
             nominal major diameter of the threads shall be at least one thousandth
             (0.001) of an inch (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 not designed to be held
             or driven with an inserted driver, nor is it designed for rotation by
             the thumb and fingers. A locking feature may be incorporated in the
             design of the head or threads. For items having close tolerance, and
             fabricated from material having 160,000 pounds per square inch (1100
             megapascals) minimum tensile strength, see BOLT, SHEAR. For items
             fabricated from material having less than 160,000 pounds per square
             inch (1100 megapascals) minimum tensile strength and not having a
             close tolerance, see BOLT, MACHINE.
            
 
CHARACTERISTIC                          VALUE
THREAD CLASS                            3A                                               
THREAD DIRECTION                        RIGHT-HAND                                       
THREAD LENGTH                           0.371 INCHES MINIMUM AND 0.411 INCHES MAXIMUM    
FASTENER LENGTH                         1.319 INCHES MINIMUM AND 1.339 INCHES MAXIMUM     
HEAD STYLE                              SPLINE DRIVE SHEAR HEAD                          
HEAD HEIGHT                             0.210 INCHES NOMINAL                             
GRIP DIAMETER                           0.5460 INCHES MINIMUM AND 0.5740 INCHES MAXIMUM  
SHANK UNTHREADED HOLE                   1.201 INCHES MINIMUM AND 1.231 INCHES MAXIMUM    
DIAMETER                                FIRST HOLE                                       
HEAD MINOR DIAMETER                     0.578 INCHES MINIMUM AND 0.585 INCHES MAXIMUM    
NOMINAL THREAD DIAMETER                 0.375 INCHES                                     
GRIP LENGTH                             0.928 INCHES MINIMUM AND 0.948 INCHES MAXIMUM    
THREAD QUANTITY PER INCH                24                                               
MINIMUM TENSILE STRENGTH                125000 POUNDS PER SQUARE INCH                    
DISTANCE FROM HEAD LARGEST              0.106 INCHES MINIMUM AND 0.111 INCHES MAXIMUM    
BEARING SURFACE TO SHANK                FIRST HOLE                                       
HOLE CENTER                                                                              
MATERIAL                                STEEL COMP XM-13 OVERALL                         
MATERIAL DOCUMENT AND                   AMS 5629 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CLASSIFICATION                                                                           
SURFACE TREATMENT                       PASSIVATE OVERALL                                 
SURFACE TREATMENT DOCUMENT              QQ-P-35 FED SPEC SINGLE TREATMENT RESPONSE OVERALL