8mm Crush Washer with 16mm flange 16mm OD, 2mm total thickness with 1mm flange Required on Rockshox Boxxer forks with oversize hole in the casting Also used in Lyrik forks.
Crush washers are sacrificial plastic washers. They are used on the foot bolts/nuts of suspension forks to protect the paint finish on the bottom of the forks. They need replaced once removed.