| Thread Size | N/A
                                                                                          .313-18 (5/16-18) | 
                                                    
                                                                        | Type | N/A
                                                                                          Self-Locking HNL | 
                                                    
                                                                        | Thread Code | N/A
                                                                                          0518 | 
                                                    
                                                                        | A (Shank) Max. | N/A
                                                                                          .058 in   | 
                                                    
                                                                        | Min. Sheet Thickness | N/A
                                                                                          .058 in | 
                                                    
                                                                        | Hole Size in Sheet + 0.005  - 0.000 | N/A
                                                                                          .413 in | 
                                                    
                                                                        | C Max. | N/A
                                                                                          .412 in | 
                                                    
                                                                        | E ± .010 | N/A
                                                                                          .575 in | 
                                                    
                                                                        | T2 ± .010 | N/A
                                                                                          .240 in | 
                                                    
                                                                        | Min. Dist. Hole C/L to Edge1 | N/A
                                                                                          .420 in | 
                                                    
                                                                        | Thread Specification | N/A
                                                                                          IFI 100/107 Grade B | 
                                                    
                                                                        | Fastener Material | N/A
                                                                                          Carbon Steel | 
                                                    
                                                                        | Material Finish | N/A
                                                                                          Zinc plated per ASTM B633, SC1 (5µm), Type III, colorless plus sealant/lubricant | 
                                                    
                                                                        | For Use in Sheet Hardness | N/A
                                                                                          HRB 60 / HB 107 or Less | 
                                                    
                                                                        | CAD Supplier | N/A
                                                                                          PennEngineering® (PEM®) |