How to Set a Blind Rivet

A blind rivet creates a permanent joint using access from one side of the assembly. A rivet tool pulls the mandrel, forming the rivet body behind the materials and clamping them together.

Standard and structural blind rivets follow a similar basic process, but their tooling and inspection requirements can differ. Always use the instructions for the specific rivet and installation tool.

Before You Start

Choose a rivet with a grip range that includes the combined thickness of the materials. Confirm that its material, diameter and head style suit the joint, and that your tool has the required pulling force, stroke and nosepiece.

Wear suitable eye protection, secure the workpiece and follow the tool's safety instructions. Keep hands clear of the moving mechanism and collect discarded mandrels safely.

1. Prepare the Hole

Align the materials and prepare the hole to the rivet manufacturer's specified diameter and tolerance. Do not assume the hole should be exactly the same size as the nominal rivet diameter.

Remove loose swarf and prepare the hole edges as specified, without enlarging the hole. Check that there is enough clearance behind the assembly for the rivet to form.

2. Position the Rivet

Insert the rivet body through the aligned hole until the underside of its head sits firmly against the accessible surface. Keep the materials together so the rivet does not set across an unintended gap.

3. Engage the Tool

Fit the correct nosepiece and insert the mandrel into the tool according to its instructions. Bring the nosepiece against the rivet head and hold the tool square to the workpiece.

Some tools allow the rivet to be loaded before it is placed in the hole. Use the sequence recommended for your equipment.

4. Set the Rivet

Operate the handles or trigger as directed. The tool pulls the mandrel, causing the blind end of the rivet body to form and retain the materials. Continue the setting cycle until the mandrel breaks at its designed break point.

A broken mandrel alone does not prove that the rivet has set correctly. Grip range, hole preparation and tool compatibility still need to be right.

5. Inspect the Joint

Check that the head is seated against the panel and that the assembly has no unintended gaps or movement. Where accessible, inspect the blind-side formation against the manufacturer's guidance.

Check the mandrel break position and retention requirements for the rivet type. If the installation appears incomplete or damaged, investigate the cause and follow the approved replacement procedure.

Setting Structural Rivets

Structural blind rivets may require dedicated nose assemblies and higher-capacity equipment. A tool that accepts the mandrel is not necessarily capable of setting the rivet correctly.

Many structural designs mechanically lock the retained mandrel into the rivet body. Follow the product-specific setting procedure and inspect the locking feature, break position and blind-side formation as required. These features vary between rivet families.

For load-bearing or critical joints, follow the engineered design and specified inspection or testing requirements. Do not substitute a structural rivet solely on the basis of diameter.

Common Mistakes to Avoid

Using a rivet outside its specified grip range
Preparing a hole that is oversized, misaligned or outside tolerance
Using an incompatible tool or nosepiece
Holding the tool at an angle or away from the rivet head
Setting the rivet while unintended gaps remain between the materials
Ignoring the clearance needed for the blind-side formation

Need a Removable Connection?

A blind rivet forms a permanent joint. If the attached component needs to be removed regularly, a rivetnut may be more suitable. It creates a fixed internal thread for a removable screw or bolt, but requires its own selection and installation procedure. It is a different fastening solution, not automatically a stronger one.

Check Before Production

Make trial installations when using a new rivet, material combination or tool setup. Confirm the finished joint against the product guidance before repeating the process across the assembly.