Blind Rivet GESIPA 4×9.5 mm Aluminum body Steel mandrel for 3.5–5 mm

Blind Rivet GESIPA 4×9.5 mm Aluminum body Steel mandrel for 3.5–5 mm is a single-sided fastening element designed for creating permanent joints in applications where back access is limited or impossible. The rivet features a lightweight aluminum body combined with a high-strength steel mandrel to ensure reliable clamping of thin sheets, profiles and assembled components. It is intended for use with pre-drilled holes and is suitable for material thicknesses and hole diameters specified for 3.5–5 mm environments.

Advantages

The aluminum body provides corrosion-resistant contact with joined materials while keeping overall rivet weight low. The steel mandrel delivers the tensile strength necessary for forming a firm blind head and consistent swaging action during installation. The 4×9.5 mm size offers a balance between low profile and sufficient grip range, making the rivet appropriate for many light-to-medium duty fastening needs. Compatibility with single-sided riveting tools simplifies installation where access is restricted to one side.

Key specifications

• Body material: aluminum
• Mandrel material: steel
• Rivet diameter × grip length: 4 × 9.5 mm
• Suitable hole diameter / material thickness range: for 3.5–5 mm
• Fastening type: blind (single-sided) rivet
• Application: permanent mechanical joint for thin to medium-thickness materials

How to use

Drill or prepare a hole matching the specified diameter range, insert the rivet through the aligned parts so the aluminum body passes into the hole and the steel mandrel remains exposed. Use a compatible blind rivet tool to pull the mandrel until the body deforms and forms a blind head on the far side, then continue pulling until the mandrel breaks off at its designed break point. After installation, verify the formed head and ensure the joined parts are clamped securely without excessive gap or movement.

Recommendations

Select a drill size that matches the rivet's recommended hole diameter to ensure correct swaging. For corrosion-sensitive assemblies, consider material compatibility between the aluminum body and the joined parts to avoid galvanic corrosion. Use a rivet tool rated for the rivet diameter to achieve consistent setting force and reduce tool wear. When fastening thin or soft materials, support the workpiece to prevent distortion during installation.