Stainless Steel 316 Pipe Fitting, Hex Countersunk Plug, Class 1000, 1/4" NPT Male Hex countersunk plug for closing and terminating the end of a pipe Male National Pipe Taper (NPT) threads for use with female threaded pipes Made from stainless steel 316 for strength Hexagonal countersunk head for increased leverage and use with a wrench Meets standards ASTM A182, ASME SA182, and ANSI B16.11 for quality assurance