254 SMO Double End Studs 
 
254 SMO Double End Studs  
have threads on both closures of the same thread fit class.
 254 SMO Double End Studs  is typically classed 2A or if looser resistances are permitted, business nut fit. The body, the zone between the thread, might be either equivalent to the ostensible major diameter of the thread or equivalent to the pitch diameter.
      
    
    
| Studs / Threaded Rod | DIN | ISO | UNI | ANSI/ASME | ASTM | 
  
    
    
        
| Double End Stud | 939 | - | - | - | - |