Part # 1426 x 6 - 6pc. Steel Brake Line tube Nuts for 3/16" Steel Brake Line Tubing Inverted Flare Standard 7/16"-24 thread. OEM Brake Line Fitting for 3/16" or 4.70 MM Tubing, Thread 7/16-24, Hex Head 7/16", OAL. 565, Length of Thread. 350, Finish Red Zinc.