Capping washers distribute pressure
to a wider surface area on the cap.
They are 1-1/4"x 2" Aluminum
5/16" thick, and relieved in the center.
Allowing pressure near the edges first,
giving you a better glue joint!
Basic flat or fender washers, only put
pressure near the base of the screw.
ITEM # CW-22
Set of 5-...... $35