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blind rivet, also known as a pop rivet, is a type of fastener used to join two or more materials together when access to the backside of the joint is limited or impossible. It consists of a cylindrical body with a mandrel, or stem, extending from one end. Here is a description of a blind rivet:

1. Construction: A blind rivet typically consists of four main components: a cylindrical body, a mandrel, a head, and a mandrel retention mechanism. The body is hollow and has a pre-formed internal flare or bulge near the end. The mandrel is a thin stem that extends through the body of the rivet. The head is larger than the body and provides a bearing surface for installation.

2. Installation Process: To install a blind rivet, a rivet gun or tool is used. The rivet is inserted into a pre-drilled hole in the materials to be joined. As the rivet gun is activated, it pulls the mandrel, which causes the blind end of the rivet body to deform and expand. This creates a secure connection and clamps the materials together.

3. Mandrel Retention: Once the blind rivet is properly installed, the mandrel is typically sheared off or snapped at a predetermined point. Some blind rivets have a mandrel retention mechanism that holds the mandrel in place after installation, while others allow the mandrel to fall out.

4. Types and Materials: Blind rivets come in various types and materials to suit different applications. Common materials include aluminum, steel, stainless steel, and copper. Each material offers different strength, corrosion resistance, and temperature tolerance properties.

5. Advantages: Blind rivets offer several advantages, including ease of installation, a wide grip range, and the ability to join materials without requiring access to the rear side of the joint. They are often used in applications where the materials being joined are thin, where the rear side is not accessible, or where disassembly is not required.

6. Applications: Blind rivets are widely used in industries such as automotive, aerospace, construction, electronics, and manufacturing. They are commonly used for assembling sheet metal, plastic, fiberglass, and other lightweight materials.