Flat Rivets, otherwise known as countersunk rivets, are a type of blind rivet that connects two pieces of material quickly and efficiently while leaving a flush surface behind. The hat of the rivet is almost inverted, with a 120-degree countersink in the integrated washer. A countersunk rivet is used in countersunk holes and, once set, is flush to the surface. They are used in tracks where the head will not protrude into sliding tracks or rollers.
Blind rivets, also called "POP Rivets" after the brand that popularized them, have a two-piece construction; the rivet hat and the mandrel. Both the hat and mandrel are pre-assembled and ready to use. They are installed using a riveting tool to draw the mandrel, which causes the body to deform and clamp down on the workpieces, bringing them together. Upon reaching the designed clamping force, the mandrel snaps and is discarded. Countersunk Rivets have standard open-ends.
Rivets are measured in installed grip range and length. The Rivet size guide above can assist you in finding the right size rivets for your application. For more information on rivet sizing and blind rivets in general, visit our Fasteners 101 page on the subject: Blind Rivets.
Not sure what material you need? Check out our Material Guide to find the right material for your needs!
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