GUWANJI 12.9 Grade High-Strength Hex Bolt & Nut Washer Combo Set

The GUWANJI High-Strength 12.9 Grade External Hex Bolt and Nut Washer Set is crafted from durable carbon steel with a black-finished surface treatment for enhanced corrosion resistance. This four-piece combination includes a hex head bolt, hex nut, flat washer, and spring washer, adhering to national standards for quality and performance. Ideal for applications requiring robust and reliable fastening, each set features a semi-threaded M20x120 bolt with a 1.4 pitch.

type: Four-part bolt Surface treatment: Black Performance level: 12.9 Implementation Standards: National Standard Pitch: 1.4 length: 120 Material: Carbon Steel