Cleko

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A cleko is a fastener used to temporarily fasten sheet material together before the pieces are permanently affixed. Clekos are inserted into premade holes using a special tool (which is also used to remove them). Clekos can be used to allow a piece to be checked for fit or articulation before it is permanently assembled. A piece may also be completely fitted with clekos, which are then replaced one-by-one with permanent fasteners, preventing any matching holes from drifting apart during final assembly.

Since they require holes to function, clekos are typically replaced by rivets.

Clekos are commonly used in aircraft and hot rod construction.

Clekos are manufactured by the Cleko corporation.