There are 4 types of M6 triangle washer head screws available, including M6*10, M6*12, M6*16, and M6*20. Choose the appropriate length based on your needs. Specification: Model: M6ST1 Size: M6 Length: 10/12/16/20mm Quantity: 50 pieces per set Material: Stainless steel Color: Silver Screw drive type: External triangle Screw head type: Triangle washer head Features: 1. Available in 10mm, 12mm, 16mm, and 20mm lengths, allowing you to select the suitable size. 2. Made of 304 stainless steel for high hardness, corrosion resistance, anti-rust performance, and long-lasting durability in various environments. 3. Silver finish with a metallic luster that blends well in multiple applications. 4. Suitable for industrial equipment, quadcopters, DIY projects, home repairs, and other uses. 5. Provides added security as the external triangle drive is less common and more difficult to remove with standard tools. Package Included: 1 x Set of 50 pieces M6 triangle bolts