M18-20 High-Strength Black Hex Socket Head Cap Screws with Knurled Cylindrical Bolts

These high-strength screws feature a black hex socket head cap design, providing excellent durability and reliability for a wide range of applications. The knurled cylindrical bolts ensure a secure grip, making them ideal for projects that require precision and stability. Crafted to withstand heavy usage, these screws are perfect for both industrial and everyday tasks, delivering exceptional performance and long-lasting quality. Suitable for various materials, they offer versatility and strength in demanding environments. Performance Level: 8.8 Material: 40Cr (alloy steel) Surface Treatment: Oxidation black Standard No.: DIN912 Manufacture country: China Instructions included: No