304 Stainless Steel Brake Fuel Transmission Line Tubing 3/8" OD Coil Roll (L-4-1) SAE ASTM ISO Brake Line tube Tubing Automotive Marine Brake & Fuel Line Fittings tube nuts threaded 3/8-24 7/16-24 1/2-20 9/16-18 Thread Fitting Zinc Plated Gold Zinc Silver Transmission