What Is a Structural Rivet?
A structural rivet is a high-strength blind fastener designed for demanding joints. It can be installed from one side of the assembly, making it useful where access to the rear face is restricted.
Many structural rivet designs mechanically lock the retained portion of the mandrel into the rivet body. This supports the fastener's installed performance and helps prevent the retained mandrel from becoming loose. The exact locking mechanism and performance depend on the product.
How Structural Rivets Work
An installation tool pulls the mandrel through the rivet body, forming the blind-side fastening feature and clamping the materials together. The mandrel breaks at its designed break point, leaving the retained portion secured according to the rivet's design.
Correct installation requires a suitable hole, a material thickness within the specified grip range and a compatible tool and nosepiece.
Why Choose a Structural Rivet?
- High-strength fastening: Designs are available with published shear and tensile ratings for demanding applications.
- One-sided installation: No need to hold a separate nut behind the joint.
- Mandrel retention: Suitable designs secure the retained mandrel within the installed fastener.
- Efficient assembly: Can provide an alternative to welding or bolting where the joint design permits.
Resistance to vibration and repeated loading must be assessed for the complete joint. The term “structural” alone does not establish a rivet's suitability for a particular load-bearing application.
Typical Applications
Structural rivets are used in commercial vehicle bodies, trailers, agricultural machinery, construction equipment, transport assemblies and industrial fabrication. Their suitability depends on the materials, loads and service conditions involved.
Sizes, Grip Ranges and Materials
Common nominal diameters include 4.8 mm and 6.4 mm, although sizes vary between product families. Grip range is the minimum and maximum combined material thickness the rivet is designed to secure. Select a rivet whose published range includes your assembled thickness.
Material combinations can include aluminium/steel, steel/steel, stainless steel/stainless steel and aluminium/stainless steel, depending on the range. These descriptions normally identify the rivet body material first and the mandrel material second.
Check both materials for strength, corrosion compatibility and exposure to moisture or chemicals.
Structural Rivets vs Standard Blind Rivets
Standard blind rivets are commonly used for general-purpose fastening. Structural designs offer specific features for more demanding joints, which may include higher load ratings, mechanical mandrel locking or particular blind-side formations.
Compare individual product data rather than assuming every structural rivet outperforms every standard rivet. Diameter, material, grip range and joint design all affect the result.
Choosing the Right Structural Rivet
- Identify the materials and combined thickness being joined.
- Check the required shear and tensile performance against published data.
- Consider panel bearing, edge tear-out and head pull-through, not just rivet strength.
- Confirm head style, hole dimensions, edge distances and blind-side clearance.
- Account for corrosion exposure, vibration, fatigue and any sealing requirements.
- Use the specified installation tool, pulling force, stroke and nosepiece.
Installation and Joint Verification
Prepare the hole to the manufacturer's specification and keep the materials correctly aligned during setting. Inspect trial installations before production and use the specified checks to confirm that the rivet has formed and locked correctly.
For structural or other critical applications, follow the engineered joint design and relevant approval requirements. A published fastener strength is not, by itself, the allowable load for the finished assembly.
A Fastener Matched to the Joint
Structural rivets offer a practical blind-fastening option for demanding assemblies. Reliable results depend on selecting the correct product, using compatible equipment and verifying the performance of the complete connection.