Everflow BRFF0012-NL 1/2 Inch Female NPT Threaded Brass Floor Flange with Holes 125 Lead Free, Durable, Brass Construction, Higher Corrosion Resistance, Economical & Easy to Install Brass Floor Flange for Securing Pipe to the Floor or a Wall Brass Pipe Fitting with Female National Pipe Taper (NPT) Threads for Securing Pipe to Floors or Walls. Manufactured to Standard ASTM B-584-06 for Lead-Free Quality Assurance It has NPT Threads for Creating a Tighter Seal Than Straight Threads and Bolt Holes for Connecting to Flat Surfaces Certified to Meet NSF/ANSI 61-G Standard for Quality Assurance.