When it comes to reliable fastening solutions, the Round Head Bolt stands out for its versatility and durability in various industrial applications. These bolts are engineered to provide strong connections in machinery, automotive assemblies, and construction projects. The black finish enhances corrosion resistance, making them ideal for outdoor or harsh environments. Whether you're securing heavy equipment or assembling structural frameworks, these bolts ensure long-lasting performance. For superior quality and precision, our range of Round Head Bolts meets international standards, delivering unmatched strength and reliability. Explore our selection to find the perfect fit for your needs, backed by years of expertise in fastener manufacturing.


The Black Round Head Bolt features a smooth, rounded head design that minimizes protrusion, reducing the risk of snagging or injury in tight spaces. Made from high-grade steel, it undergoes a rigorous black oxide coating process to resist rust and wear. This bolt is commonly used in applications where a flush surface is desired, such as in furniture assembly, automotive parts, and electrical enclosures. Its robust construction ensures it can withstand high torque and vibration without loosening. The Black Round Head Bolt is available in various sizes and thread patterns to accommodate diverse project requirements, providing a secure and efficient fastening solution every time.

Key Specifications

  • Material: High-carbon steel
  • Finish: Black oxide coating
  • Head Type: Round
  • Drive Type: Hex socket or slotted
  • Thread Type: Metric or imperial
  • Standards: ISO 7380, DIN 7380, ANSI B18.3
Size (Diameter x Length) Thread Pitch Torque Capacity (Nm) Recommended Applications
M6 x 20mm 1.0mm 10-12 Nm Light machinery, electronics
M8 x 30mm 1.25mm 20-25 Nm Automotive parts, furniture
M10 x 40mm 1.5mm 35-40 Nm Construction, heavy equipment
M12 x 50mm 1.75mm 55-60 Nm Industrial machinery, structural frames

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