uxcell 10 Pcs 3/8" PT Thread Metal Internal Hex Head Socket Pipe Connector Product Name : Hex Head Pipe Connector;Color : Silver Tone Material : Metal;Thread Diameter : 16mm Thread Size : 3/8" PT;Hex Side to Side Diatance : 8mm/ 0.31" High : 10mm/ 0.39";Net Weight : 109g Package Content : 10 x Hex Head Pipe Connector