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China Dome Head Bolt Manufacturer, Supplier, Factory

When constructing robust industrial assemblies, the selection of fasteners is paramount for ensuring structural integrity and longevity. Among the essential components, the Dome Head Bolt stands out for its unique design and reliable performance. Its smooth, rounded head offers a finished, aesthetically pleasing look while providing excellent clamping force. For applications requiring a flush surface or enhanced appearance without sharp edges, Dome Head Bolts are the ideal choice. Engineers and procurement specialists often compare these with other specialized bolts, such as the Cup Head Bolt, to determine the best fit for their specific mechanical and environmental requirements. By understanding the distinct advantages of each fastener type, including the Cup Head Bolt, professionals can optimize their designs for superior durability and safety in demanding conditions.


Exploring the technical aspects of the Dome Head Bolt reveals why it is a staple in numerous sectors, from automotive manufacturing to heavy machinery. This fastener is engineered with precision to meet rigorous standards, ensuring consistent quality and performance. The Dome Head Bolt features a dome-shaped head that not only enhances visual appeal but also reduces the risk of snagging and injury in exposed applications. Its design allows for efficient installation with standard tools, making it a practical solution for both assembly lines and field maintenance. Below are the detailed specifications and parameters that define the Dome Head Bolt, presented to assist in material selection and project planning.

Key Specifications of Dome Head Bolt

  • Material Grade: Typically manufactured from high-strength steel, stainless steel, or alloy steel.
  • Head Type: Dome-shaped with a smooth, polished finish.
  • Thread Type: Standard metric or imperial threads available, with fine or coarse pitch options.
  • Drive Type: Commonly available in hex socket (Allen) drive for secure, tamper-resistant installation.
  • Surface Treatment: Options include zinc plating, galvanization, or black oxide for corrosion resistance.
  • Standards Compliance: Meets or exceeds ISO, DIN, ANSI, and other international standards.

Detailed Parameter Table

Parameter Description Common Values / Options
Diameter (d) Nominal thread diameter M6, M8, M10, M12, 1/4", 5/16", 3/8"
Length (L) Length under the head 20mm, 25mm, 30mm, 35mm, 40mm, 1", 1.5", 2"
Head Diameter (D) Diameter of the dome head 10mm, 13mm, 16mm, 19mm, 0.5", 0.625"
Head Height (H) Height of the dome head 3mm, 4mm, 5mm, 6mm, 0.12", 0.16"
Tensile Strength Maximum tension load before failure 800 MPa, 1000 MPa, 1200 MPa (depending on grade)
Proof Load Load at which permanent deformation begins 580 MPa, 700 MPa, 830 MPa (depending on grade)
Hardness Material hardness (Rockwell scale) HRC 32-39, HRB 85-100 (varies with material)
Temperature Range Operational temperature limits -50°C to +300°C (for standard steel grades)

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