Slotted Hex Nuts have slots in the top of the nut that allow for the use of cotter pins to help secure the fastner and prevent loosening of the nut
            
        
            | Type | Nut | 
| Style | Slotted Hex | 
| Size | 1/2"-20 | 
| Material | Carbon Steel | 
| Grade/Class | 2 | 
| Thread Direction | Right Hand | 
| Thread Type | SAE / UNF (Fine) | 
 
                          
                 
                 
                 
                 
                