- The left hand threaded end of all right and left couplings is knurled for identification.
 - All sizes of right and left couplings are taper tapped 3/4" per foot (62.5mm per meter) on the diameter and all are dipped in rust preventative.
 
                    Unit of Measure
                    
               
        
            
                                                                                NPS | 
                                                                        N/A 1/4 | 
                                                                                DN | 
                                                                        N/A 8 | 
                                                                                Type | 
                                                                        N/A Left Right | 
                                                                                Outside Diameter | 
                                                                        N/A 0.719 inches | 
                                                                                Outside Diameter | 
                                                                        N/A 18.00 mm | 
                                                                                Length | 
                                                                        N/A 1 3/16 inches | 
                                                                                Length | 
                                                                        N/A 30 mm | 
                                                                                Weight/100 Pieces | 
                                                                        N/A 7.25 lbs | 
                                                                                Weight/100 Pieces | 
                                                                        N/A 3.3 kg |