Thread Size
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          .313-18 (5/16-18) 
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        
                                                                                Thread Code
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          0518 
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        | 
                                                                                Shank Code1
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          2 
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        
                                                                                A (Shank) Max.
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          .087 in
                                                                                    
                                                                                                                                                      | 
                                                    
                                                    
                                                                        | 
                                                                                Min. Sheet Thickness2
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          .090 in
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        
                                                                                Hole Size in Sheet + .003 - .000
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          .413 in
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        
                                                                                C Max.
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          .412 in
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        
                                                                                E ± .010
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          .500 in
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        
                                                                                T ± .010
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          .230 in
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        | 
                                                                                Min. Dist. Hole C/L to Edge3
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          .38 in
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        | 
                                                                                For Use in Sheet Hardness4
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          HRC 30 / HB 277 or Less 
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        
                                                                                Thread Specification
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          Internal, ASME B1.1, 2B / ASME B1.13M, 6H 
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        
                                                                                Fastener Material
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          Hardened Alloy Steel 
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        | 
                                                                                Standard Finish5
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          No Finish (with Rust Preventative Oil) 
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        | 
                                                                                Optional Finish6
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          Consult technical support for recommended optional finishes. 
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        
                                                                                CAD Supplier
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          PennEngineering® (PEM®) 
                                                                                    
                                                                                                                                                     | 
                                                    
                                                    
                                                                        
                                                                                Inventory
                                                                                                                                                                                                                                 | 
                                                                        
                                                                                    
                                                                                        N/A
                                                                                          {0} 
                                                                                    
                                                                                                                                                     |