Both the unions and nuts are metric 3/8-24 threads (regular 3/16 inch tube fitting size). Brake pipe nut is made of high strength steel, and its surface is coated with anti-corrosion layer. Kiefer Sutherland stars as CTU Agent Jack Bauer in this unique series in which the entire season takes place in one day, with each of the 24 episodes covering one hour and told in real time Note: The nut threads are regular tube fitting size. Application: This Brake Line Fittings Assortment is suitable for inverted bellmouth on 3/16 inch and 1/4 inch Tube. Brake Cable Connector High Quality Unions Brake Pipe T Piece Tee TPI 3/16 Pipe UNF 24 Useful 3 Way Brake Pipe Joiners PACKAGE INCLUDE - MuHize upgraded brake line fittings replacement (pack of 15): ① 6 x 3/8-24 threads unions; ② 12 x 3/8-24 threads nuts. Note:Both the unions and nuts are 3/8-24 threads (regular 3/16 inch tube fitting size Please confirm the size of the details according to the picture before purchasing. Fit for 3/16” Brake Line: The unions measures approx., 0., 54 x 0., 62 inch; The nut measures approx., 0., 6 x 3/8 inch. These brake line union are good fittings to share with your family and friends. 3/16 Brake Line Fittings 20 Pcs Brake Line Nuts Fittings M10 X 1mm Metric Brake Line Invert Fittings For 3/16 Inch Brake Line Tube Inverted Flare Fitting Assortment Our brake line accessory series is widely compatible with various vehicle models, including trucks, sedans, SUVs, and motorcycles.