Blind rivets GESIPA 4.0 x 12.0 mm Alu/Steel large head, pack of 500

Pack of 500 GESIPA blind rivets, size 4.0 x 12.0 mm, aluminium body with steel mandrel and large head. These blind (pop) rivets are designed for permanent fastening of overlapping materials when access is available from only one side. The combination of an aluminium sleeve and a steel mandrel gives a balance of light weight and reliable mandrel strength, while the large head increases bearing surface to reduce pull-through on softer materials. The pack of 500 ensures a steady supply for medium and large assembly tasks.

Advantages

Blind rivets GESIPA 4.0 x 12.0 mm Alu/Steel large head offer rapid installation with a compatible rivet tool and form a vibration-resistant joint suitable for diverse materials. The aluminium body resists corrosion in many environments and keeps overall joint weight low, while the steel mandrel provides secure setting and consistent expansion for repeatable results. The large head design distributes load over a wider area to protect thin sheets and plastics from deformation.

Suitable for

• Joining sheet metal panels in HVAC, enclosures and ductwork
• Fastening plastic parts and lightweight composites
• General light structural assemblies and repair work
• Applications where only one-sided access is available

Key specifications

• Rivet type: blind (pop) rivet with large head
• Body material: aluminium
• Mandrel material: steel
• Nominal diameter: 4.0 mm
• Grip length / body length: 12.0 mm
• Pack quantity: 500 pieces

How to use

Select a rivet of the correct diameter and grip range for the combined thickness of the materials to be joined. Drill a hole matching the rivet diameter, insert the rivet through the aligned parts until the head sits flush against the contact surface, and engage the mandrel in a compatible blind rivet tool. Operate the tool according to its instructions until the mandrel snaps, forming the blind head and completing the joint. Remove the spent mandrel remains where applicable and inspect the formed blind head and clamping for proper setting.

Usage recommendations

For optimal results, ensure material edges are clean and free of debris, and confirm the combined material thickness falls within the rivet’s recommended grip range. Use a rivet tool matched to 4.0 mm blind rivets and maintain consistent tool pressure for uniform setting. When fastening softer materials, consider using the large head to reduce pull-through; for environments with higher corrosion risk, evaluate compatible rivet materials or protective coatings.