Rivet Size Calculator

Rivets join two materials together with a permanent mechanical fastener — but using the wrong size can mean a weak joint or a failed connection. Enter your First Material Thickness and Second Material Thickness, then select your Rivet Type, Material Type, and Application Type to get the Recommended Rivet Diameter. Secondary outputs include Rivet Length, Drill Hole Size, and the Minimum and Maximum Grip Range for your joint.

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inches

Results

Recommended Rivet Diameter

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Rivet Length

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Drill Hole Size

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Minimum Grip Range

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Maximum Grip Range

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Frequently Asked Questions

How do I choose the right rivet size?

The rivet diameter should be at least 3 times the thickness of the thickest material being joined. The rivet length should accommodate the total material thickness plus additional length for proper installation and mandrel engagement.

How do I calculate rivet diameter?

Multiply the thickness of your thickest material by 3 to get the minimum rivet diameter. For structural applications or high-load situations, you may need to increase this diameter further for adequate strength.

Can a rivet be too long?

Yes, using a rivet that's too long can cause installation problems and weak joints. The rivet should extend beyond the materials just enough to form a proper head - typically 1.5 times the rivet diameter for solid rivets.

What is the grip range of a rivet?

The grip range is the range of material thicknesses that a specific rivet can effectively fasten. It's determined by the rivet's length and design, ensuring proper installation and joint strength across the specified thickness range.

What's the difference between pop rivets and solid rivets?

Pop rivets (blind rivets) can be installed from one side and are ideal when you can't access both sides of the work. Solid rivets require access to both sides but provide stronger joints and are commonly used in structural applications.

How much larger should the drill hole be than the rivet?

The drill hole should typically be 0.001" to 0.003" larger than the rivet diameter. This provides enough clearance for easy installation while maintaining a tight fit for optimal joint strength.

What rivet material should I use for different applications?

Aluminum rivets are lightweight and corrosion-resistant, ideal for general applications. Steel rivets provide higher strength for structural use. Stainless steel rivets offer superior corrosion resistance for marine or chemical environments.

Can I use rivets on mixed materials?

Yes, but consider galvanic compatibility between the rivet material and the materials being joined. Use stainless steel or aluminum rivets to minimize corrosion when joining dissimilar metals.