| Marking and mechanical properties of hex head fasteners UNC / UNF | 
        
            | Marking and designation of fasteners with reduced loadability | 
        
            | Marking of fasteners | 
        
            | Marking of studbolts | 
        
            | Marking of nuts according to ISO | 
        
            | Marking of nuts according to DIN | 
        
            | Pairing screws and nuts ≥ 0,8 d | 
        
            | Marking of stainless steels screws and nuts |