Units  
ISO Standard Thread
     
 
Property Class
         
Thread Pitch
       
             
  Minimum Engagement 1   Thread Total Length   Hole Total Length  
MATERIAL E
T
H
     
     
     
     
Cast iron materials      
Copper alloys      
Aluminium casting alloys      
Aluminium alloys, age-hardened      
Aluminium alloys, not age-hardened      
Plastics      
             
1) According to DIN 77