Allstar 3/8-24 Stainless Inverted Flare Nut for 3/16 inch Brake Line (Pack of 10) features an inverted flare nut which is for a 3/16 inch brake line and has 3/8-24 threads. The color is stainless for easy identification. These inverted flare nuts are used for building custom brake lines. The nuts are available separately to fit most master cylinders and metering/proportioning valves. They are sold as one set of 10 pieces..