Unit of Measure
                    
               
        
            
                                                                                Nominal Diameter | 
                                                                        N/A 5/16" | 
                                                                                Effective Length | 
                                                                        N/A 2-5/8" | 
                                                                                Head Diameter | 
                                                                        N/A .440/.428 | 
                                                                                Head Thickness | 
                                                                        N/A .100/.084 |