Brennan 5404-06-06-SS Stainless Steel Pipe Fitting, Hex Nipple, 3/8" NPT Male Nipple for joining two pipes or extending pipe length Male National Pipe Taper (NPT) threads on both ends for connecting female threaded pipes and fittings Made from stainless steel 316 for greater corrosion resistance than stainless steel 304 NPT threads for creating tighter seals than straight threads Meets SAE J514 specifications for quality assurance