Unit of Measure
                    
               
        
            
                                                                                Nominal Diameter | 
                                                                        N/A 7/16" | 
                                                                                Effective Length | 
                                                                        N/A 3-1/2" | 
                                                                                Head Diameter | 
                                                                        N/A .570/.552 | 
                                                                                Head Thickness | 
                                                                        N/A .160/.146 |