- 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 2 1/2 | 
                                                                                DN | 
                                                                        N/A 65 | 
                                                                                Type | 
                                                                        N/A Left Right | 
                                                                                Outside Diameter | 
                                                                        N/A 3.250 inches | 
                                                                                Outside Diameter | 
                                                                        N/A 83.00 mm | 
                                                                                Length | 
                                                                        N/A 3 1/8 inches | 
                                                                                Length | 
                                                                        N/A 79 mm | 
                                                                                Weight/100 Pieces | 
                                                                        N/A 216 lbs | 
                                                                                Weight/100 Pieces | 
                                                                        N/A 98 kg |