What is the difference between open and closed end blind rivets?

Blind rivets, also known as pop rivets, are fasteners used to join two or more pieces of material together from one side when access to the other side is not available. They come in two main types: open end and closed end, each with its own specific uses and characteristics.

♦ Open End Blind Rivets
Structure: An open end blind rivet consists of a tubular body (mandrel) with a flange on one end and a mandrel (a pin) that passes through the center.
Installation: During installation, the mandrel is pulled into the rivet body, causing it to expand and form a second head. The mandrel then breaks off at a predetermined point, leaving the rivet set.

Characteristics:
• The open end allows for the passage of air or fluids, which can be an advantage or a disadvantage depending on the application.
• Typically less expensive than closed end rivets.
Uses:
• Commonly used in applications where the passage of air or water is not a concern.
• Suitable for light-duty applications, such as attaching thin materials like plastics or light metals.
• Used in situations where the aesthetic appearance of the backside of the joint is not critical, since the remaining part of the mandrel may be visible.

♦ Closed End Blind Rivets

Structure: A closed end blind rivet has a dome or cup-shaped end, completely sealing the rivet once it's installed.
Installation: Similar to open end rivets, the mandrel is pulled, expanding the rivet body. However, because the end is closed, it creates a watertight seal.
Characteristics:
• Provides a sealed, watertight, and airtight joint.
• More aesthetically pleasing on the blind side, as the closed end covers the hole and the remnants of the mandrel.
• Generally more expensive due to the additional manufacturing process required to create the closed end.
Uses:
• Ideal for applications requiring a water-tight or air-tight seal, such as in marine, automotive, or HVAC industries.
• Used in electronics and other sensitive equipment where environmental protection is necessary.
• Preferred in applications where the appearance of the finished product is important, as they provide a cleaner look on the blind side of the joint.

Choosing between open and closed end blind rivets depends on the specific requirements of the project, including the need for a seal, the budget, and the desired appearance.

Are you using open or closed-end blind rivets in your projects? And if you have any questions about how to choose the right blind rivets for your needs, don't hesitate to reach out.
• Michelle
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