AGS Fitting Assortments are designed for specialty and general repair shops. Each assortment contains a specific collection of fast moving fittings that should be kept on hand when working with automotive hydraulic braking systems. Assortments are packaged in shatter-resistant, see-through plastic trays. Locator labels on the inside lid make locating, selecting, and re-filling quick and easy. Tube Nut Assortment - 9 SKU. Includes nine specialized tube nuts used in 8in brake adapter lines for connecting different sized port openings on master cylinders to standard brake systems. Contains both SAE Inverted and ISO Bubble tube nuts as well as UNF Imperial and Metric threads.