The flat socket head enables driving where there is not sufficient space for wrenches or sockets, and allows the screw head to sit flush with the surface
            
        
            | Type | Cap Screw | 
| Style | Flat Head Socket | 
| Size | 1/4"-20 | 
| Length | 1-1/4" | 
| Material | Carbon Steel | 
| Specifications | ANSI B18.3, ASTM A574 | 
| Tensile Strength | 180,000 PSI | 
| Thread Type | USS, UNC |