| Thread Size | N/A
                                                                                          .250-20 (1/4-20) | 
                                                    
                                                                        | Type | N/A
                                                                                          NFPA | 
                                                    
                                                                        | Thread Code | N/A
                                                                                          0420 | 
                                                    
                                                                        | A Max. | N/A
                                                                                          .315 in   | 
                                                    
                                                                        | C Max. | N/A
                                                                                          .311 in | 
                                                    
                                                                        | E Nom. | N/A
                                                                                          .312 in | 
                                                    
                                                                        | Min. Sheet Thickness | N/A
                                                                                          .328 in | 
                                                    
                                                                        | Hole Size in Sheet + .003 - .000 | N/A
                                                                                          .312 in | 
                                                    
                                                                        | Min. Boss Dia. | N/A
                                                                                          .750 in | 
                                                    
                                                                        | Min. Depth Full Thread H1 | N/A
                                                                                          .300 in | 
                                                    
                                                                        | Thread Specification | N/A
                                                                                          2B per ASME B1.1 | 
                                                    
                                                                        | Standard Material | N/A
                                                                                          Aluminum | 
                                                    
                                                                        | Standard Finish | N/A
                                                                                          Plain | 
                                                    
                                                                        | CAD Supplier | N/A
                                                                                          PennEngineering® (SI®) |