The nuts are metric M10x1.0 threads, fit for use with 3/16 inch steel, poly coated, or copper brake lines. | Made of durable Galvanized Steel to prevent rust and corrosion resistance, firm and durable, have a long service time. | Material: Galvanized Steel . Thread Size: M10x1.0, Product Size: 14 x 9mm / 0.55 x 0.35(L*D) | Universal for cars, SUVs, motorcycles, ATVs, trucks, etc. | Package included: 20 x Nuts