BOLT
P/N ST3M571-5-18
P/N VS3060-5-18
P/N 74328-5-18
NSN 5306 00 352 0458
MFG BOEING COMPANY
 
NEW GOV SURPLUS
 
ITEM NAME:   BOLT,SHEAR
DEFINITION:  A high strength, 160,000 pounds per square inch (1100 megapascals)
             minimum tensile strength externally threaded fastener designed for use
             in applications involving great shear stress. The head is designed to
             accommodate an external wrench or driver. 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. The unthreaded portion is of
             specific 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. A locking feature may be incorporated
             in the design of the head or threads. See BOLT, MACHINE and BOLT,
             CLEVIS.
            
 
CHARACTERISTIC                          VALUE
THREAD CLASS                            3A                                               
THREAD DIRECTION                        RIGHT-HAND                                        
THREAD LENGTH                           0.526 INCHES MINIMUM AND 0.576 INCHES MAXIMUM    
FASTENER LENGTH                         1.661 INCHES MINIMUM AND 1.691 INCHES MAXIMUM    
HEAD STYLE                              DOUBLE HEXAGON W/HOLE                             
HEAD HEIGHT                             0.338 INCHES MINIMUM AND 0.358 INCHES MAXIMUM    
WIDTH BETWEEN FLATS                     0.367 INCHES MINIMUM AND 0.376 INCHES MAXIMUM    
EXTENDED WASHER DIAMETER                0.521 INCHES MINIMUM AND 0.531 INCHES MAXIMUM    
EXTENDED WASHER THICKNESS               0.072 INCHES MINIMUM AND 0.092 INCHES MAXIMUM    
GRIP DIAMETER                           0.3115 INCHES MINIMUM AND 0.3120 INCHES MAXIMUM  
NOMINAL THREAD DIAMETER                 0.312 INCHES                                     
GRIP LENGTH                             1.115 INCHES MINIMUM AND 1.135 INCHES MAXIMUM    
THREAD QUANTITY PER INCH                24                                               
MINIMUM TENSILE STRENGTH                220000 POUNDS PER SQUARE INCH                    
MATERIAL                                STEEL CORROSION RESISTING OVERALL                
SURFACE TREATMENT                       PASSIVATE OVERALL                                
DESIGN CONTROL REFERENCE                ST3M571-5-18                                     
THE MANUFACTURERS DATA                  76301