npt male plug: 1,material:ss304,ss316,brass,copper 2,size:1/ ... for Fitting Pipes:Φ3 to Φ30Cone Thread: ZG, R, GPT, NPT.etcYuwei Lok brand series products have 10 strengths following, our ... industry,10. Simple style nut (ferrule structure and general) brass npt thread male plug adapter