- Case hardened, black oxide finish
 - Commonly known as a coupling nut
 
                    Unit of Measure
                    
               
        
                                
                                                                                Product Type | 
                                                                        N/A Nuts | 
                                                                                Material | 
                                                                        N/A Steel | 
                                                                                Thread (A) | 
                                                                        N/A 5/16-18 | 
                                                                                B | 
                                                                        N/A 9/16 in | 
                                                                                C | 
                                                                        N/A 7/8 in | 
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