Material: These hex nuts are made of 304 stainless steel, providing strength and good corrosion resistance in various environments. Good Alternatives: Suitable as replacements for industrial and construction fasteners. Variety of Sizes: A range of commonly used hexagonal nut sizes to meet diverse needs. Wide Application: Widely used in household and office appliances, communication equipment, ship assembly, and other machinery industries. Includes Storage Box: 140 pcs hex nuts in different sizes organized by category for easy storage and use, preventing loss or mix-up. Specification: Material: 304 stainless steel Size & Quantity: M1 x 0.1 – 20 pcs M1.2 x 0.1 – 20 pcs M1.4 x 0.1 – 20 pcs M1.6 x 0.1 – 20 pcs M2 x 0.1 – 20 pcs M2.5 x 0.2 – 20 pcs M3 x 0.2 – 20 pcs Weight: 48g / 1.7oz (approx.) Package List: 1 x Storage Box with Nuts