406-04 Merrit Brass T304 1/4" Stainless Steel Tee The Merit Brass tee is a class 150 stainless steel 304 cast pipe fitting with female National Pipe Taper (NPT) threads for connecting and branching three sections of male pipes or fittings. It has National Pipe Taper (NPT) threads for creating tighter seals than straight threads. Made of stainless steel 304, the lower carbon content of this tee ensures higher corrosion resistance than 302 grade steel.Tee with three openings to connect and branch three sections of pipeFemale National Pipe Taper (NPT) threads for use with male threaded pipesMade of stainless steel 304 for greater strength than 302 grade steelLow carbon content for greater resistance to corrosionConforms to standards ISO 49 and ANSI B1.20.1 for quality assurance