Washer skewer used to hold skewers in place when used in DIY foam RC plane models. It helps reduce wear on the foam and better guide and hold the skewers in place. My example shows it being used on the FT Simple Cub from FliteTest.
Instructions:
Make a skewer hole in the foam first to align the washer. Apply a few dabs of hot glue on the washer and push into foam board until flush.
The author marked this model as their own original creation.