Dixon 3030RDSSAP Stainless Steel Tank Truck Fitting, Thread Adapter, 3" BSPP Female x 3" NPT Male Adapter for connecting two different types of pipes or hoses Female British Standard Pipe Parallel (BSPP) threads and male National Pipe Taper (NPT) threads for connecting male pipe to female pipe Stainless steel 316 for higher strength and greater corrosion resistance than stainless steel 304 PTFE gasket for resistance to chemicals, moisture, and high temperatures For tanker truck chemical and fuel transport applications