General description The 180pcs Flat Washer assortment is made of high-quality brass, which is composed of copper and zinc. This set includes flat washers in various sizes, designed to provide effective sealing and support in a wide range of applications. Technical specifications Material: Brass (Copper and Zinc) Number of Pieces: 180 Sizes: M2, M2.5, M3, M4, M5, M6, M8, M10 Corrosion Resistance: Good under most working conditions (not suitable for acid vinegar, ammonia, salt, and acetyl) Usage Reduces friction when used with bolts or nuts Prevents leakage and isolation Prevents loosening and disperses pressure Widely used in equipment manufacturing, engineering machinery, agricultural machinery, transmission and distribution, construction, and other industrial and civil fields Other information Packed in a storage box for easy organization and access