PCB rivets are very useful for double-sided PCBs, providing sturdy and reliable mechanical and electrical connections between the 2 layers of the board.
Source: https://www.makera.com/products/pcb-rivets-200pcs

| Variant | Price | Availability |
|---|---|---|
| 0.2mm Solid | 2.99 USD | In Stock |
| 0.3mm Solid | 2.99 USD | In Stock |
| 0.4mm Solid | 2.99 USD | In Stock |
| 0.5mm Solid | 2.99 USD | In Stock |
| 1mm OD * 0.6mm ID | 2.99 USD | In Stock |