Hippocampus nails are a type of structural rivet with good hole filling performance, good airtightness, and high riveting strength. Suitable for high surface requirements and high rivet strength requirements. The special design of the deformed part at the tail of the seahorse nail is easy to locate the hole, which facilitates automated installation. The contact surface formed after the deformation of the tail is larger, making it an ideal choice for low-strength metal or thinner metal plates. The tail is short and easy to install, without taking up too much space. The core rod has higher retention force, preventing noise and vibration and sinking at the broken tail. The materials include iron, aluminum, and stainless steel. Suitable for automobiles, bus ducts, high-voltage distribution boxes, ships, light rail containers, mechanical steel structures, etc. It has the characteristics of easy operation, excellent riveting appearance, high physical performance, and unidirectional riveting.