Jinyi Grade 8.8 Black Hex Nut Bolt Cap (M4, M6, M8, M10)

This high-quality black hex nut bolt cap is crafted to meet Grade 8.8 standards, ensuring robust performance and durability. Available in sizes M4, M6, M8, and M10, it is designed to securely fasten and protect bolt heads, making it ideal for a variety of mechanical and construction applications. Its sleek black finish not only enhances aesthetic appeal but also offers corrosion resistance for long-lasting use. Surface treatment: Blue and white zinc Material Grade: Carbon steel Q235 Thread specification: 36, 39, 4, 6, 3, 5, 8, 10, 42, 48, 20, 30, 33, m12, 12, twenty two, 14, twenty four, 16, m10 High: 1 Strength level: 8.8 Manufacture country: China Instructions included: No