BOLT (EA)
NSN 5306-00-206-4317
MFG MILITARY SPECIFICATIONS 
NEW GOV SURPLUS
SUPPLIER CAGE CODE 03EF7

ITEM NAME:   BOLT,MACHINE
DEFINITION:  An externally threaded fastener designed for insertion through holes

             in assembled parts and normally intended to be tightened or released

             by torquing a nut.  The threaded and unthreaded portions are both of

             one nominal diameter of 0.190 inch (5 mm) or larger. The head is not

             designed to be held or driven with an inserted driver or by the thumb

             and fingers.  A locking feature may be incorporated in the design of

             the head or threads.  Head dimensions and sizes of threaded and

             unthreaded portions shall conform to internationally recognized

             fastener standards.  For items having a grip length portion machined

             to a tolerance of 0.0015 inch (0.038 mm) or less, BOLT, SHEAR. See

             also SCREW, CAP, HEXAGON HEAD and SCREW, MACHINE.

            CHARACTERISTIC                          VALUE
THREAD CLASS                            2A                                               
THREAD DIRECTION                        RIGHT-HAND                                        
THREAD LENGTH                           1.250 INCHES MINIMUM                             
FASTENER LENGTH                         1.469 INCHES MINIMUM AND 1.500 INCHES MAXIMUM    
HEAD STYLE                              HEXAGON                                           
HEAD HEIGHT                             0.302 INCHES MINIMUM AND 0.323 INCHES MAXIMUM    
WIDTH BETWEEN FLATS                     0.725 INCHES MINIMUM AND 0.750 INCHES MAXIMUM    
NOMINAL THREAD DIAMETER                 0.500 INCHES                                     
GRIP LENGTH                             0.219 INCHES NOMINAL                             
FEATURES PROVIDED                       FINISHED HEAD                                    
THREAD QUANTITY PER INCH                13                                               
MINIMUM TENSILE STRENGTH                120000 POUNDS PER SQUARE INCH                    
HARDNESS RATING                         23.0 ROCKWELL C MINIMUM AND 32.0 ROCKWELL C      
                                        MAXIMUM OVERALL                                  MATERIAL                                STEEL OVERALL                                    
MATERIAL DOCUMENT AND                   SAE GR 5 ASSN STD SINGLE MATERIAL RESPONSE OVERALL
CLASSIFICATION                                                                           
SURFACE TREATMENT                       ZINC OVERALL                                     

NON-DEFINITIVE GOVERNMENT               MILB857                                          SPEC/STD REFERENCE                                                                        

SPEC/STD CONTROLLING DATA               81349                                            MANUFACTURERS CODE                                                                       
SURFACE TREATMENT DOCUMENT              QQ-Z-325,TYPE 3,CLASS 2 FED SPEC SINGLE TREATMENT
AND CLASSIFICATION                      RESPONSE OVERALL                                 
THREAD SERIES DESIGNATOR                UNC                                              
NONDEFINITIVE SPEC/STD DATA             2 TYPE AND C5 STYLE