- 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 3 | 
                                                                                DN | 
                                                                        N/A 80 | 
                                                                                Type | 
                                                                        N/A Left Right | 
                                                                                Outside Diameter | 
                                                                        N/A 4.000 inches | 
                                                                                Outside Diameter | 
                                                                        N/A 102.00 mm | 
                                                                                Length | 
                                                                        N/A 3 1/4 inches | 
                                                                                Length | 
                                                                        N/A 83 mm | 
                                                                                Weight/100 Pieces | 
                                                                        N/A 347 lbs | 
                                                                                Weight/100 Pieces | 
                                                                        N/A 157 kg |