12.9 Grade Blackened Carbon Steel Full Thread Hex Head Bolt

High-strength 12.9 grade carbon steel external hex head bolts, featuring a full thread design and a durable blackened finish for enhanced corrosion resistance. Ideal for heavy-duty fastening applications requiring superior strength and reliability.

Surface treatment: Black type: External hexagon Performance level: 10.9 Implementation Standards: National Standard Tooth type: fine thread Material: Carbon Steel Pitch: 45 Nominal length: 65mm Nominal diameter: 8mm