This Flat Brass Flare Nut is Great for Sealing all Flare Pipe/ Fitting Connections in Your Piping Systems. It is an Essential Component of Every Flare Connection, and Helps Create an Ultra Secure, Leak Free Seal. It Will Resist Mechanical Pull Out and Ensure that your Pipes Won't Leak or Drip. This will Handle Higher Pressure Applications than Compression Fittings. However, we do Recommend Using Long Flare Nuts when Greater Vibration Resistance is Required. Ideal for Use with Oil, Fuel, LP, and Natural Gas Pipe Lines (not for Potable Water). Manufactured with the Highest Quality Materials and Workmanship, it will Serve Your Plumbing Needs Faithfully.