A double-flush rivet is a rivet that has a 120-degree countersunk head to allow both sides of the rivet to rest flush with the surface of the material you are riveting. This type of rivet is common in electronics applications where a rivet stem protruding from the back of the object is not acceptable. A double-flush rivet requires a special rivet installation tool that you can purchase from most electronic-component supply retailers.
Things You'll Need
Drill bit set
120-degree countersink tool
Double-flush rivet gun
Drill a hole through the surface you plan to rivet. Ensure that the diameter of the hole matches the rivet's bore.
Countersink the top and the bottom surfaces with a countersink tool by placing the shank of the tool into your drill and drilling into the hole. The tool will remove material from the surface of the mating material to create the countersink. Ensure that the depth of the countersink equals the thickness of the rivet's top and bottom lip — 0.29 inch. Check the reference sheet provided with the rivets to ensure your rivets use the same thickness for the rivet lips.
Load the double-flush rivet gun with the rivet.
Place the tip of the rivet gun into the hole. Hold the gun perpendicular to the surface.
Press down on the gun as you pull the trigger to shoot the rivet into the hole. Pull the tip of the gun out of the hole.
This process of loading your rivet gun depends on the style and brand. For example, on basic models, you must load the rivet onto the end of the gun for a single installation. On more expensive models, you can load several rivets into the chamber on the gun and install several rivets in succession.