Why does the rivet head form matter?
A rivet is a fastener that permanently joins two or more parts. The head form determines both load distribution on the mounting surface and the final appearance. A wrong choice leads to a protruding surface, a loose joint, or an aesthetic flaw.
Dome (round) head rivet
The most common type. The head sits above the mounting surface and offers a wide contact area. Its load-spreading ability is high; it is preferred for soft or thin materials.
- Wide bearing area — protects the hole edge in thin sheets
- Easy to install, visually prominent
- Ideal for general-purpose assembly
Countersunk rivet
The head sinks into a machined countersink cavity and stays flush with the surface. It is critical in applications with aerodynamic requirements or where another part passes over it.
- Fully recessed — a smooth surface
- Automotive panels, aircraft, decorative surfaces
- Countersink angle (60°, 90°, 120°) is chosen by application
Semi-tubular rivet
Part of its body is hollow; this significantly reduces the force needed for riveting compared to a solid rivet. It is common on high-speed automated assembly lines.
- Low riveting force — fast assembly
- Brake linings, bag accessories, electrical panels
- Hollow depth determines strength — correct calculation matters
Which one should I choose?
Three questions decide it: Must the surface stay flush? (yes → countersunk), Is the material thin/soft? (yes → dome), Is assembly speed critical? (yes → semi-tubular). When in doubt, share your part’s technical drawing with us — our engineering team will recommend the form best suited to the application.