Vibrant Performance EGT Sensor Weld Bungs are made of 304 Stainless Steel and Grade 5 Titanium for the utmost in optimum corrosion resistance. Thread Pitch: Female 1/8" NPT Constructed with durable 304 stainless steel and grade 5 titanium, these EGT sensor weld bungs offer unparalleled corrosion resistance. Plus, with a female 1/8" NPT thread pitch, installation is a breeze. Trust in the high-quality materials and expert design for long-lasting performance.