S.S hex plug,tube plug,instrumentation tube fittings. Mtl:304,316,316L ... Thread:NPT,PT,BSP certificate:ISO.. Features for stainless steel hex plug :1) Nominal Pressure:≤6000PSI2) Applicable temperature:≤1503) Applicable medium ... :air,water,oil article and corrosive media etc.4) Materials:(forged boby) 304,316,316L,3215) Thread:ZG,NPT ...