Thanks Rich i have always been curious of that fastener and yes this is an old race boat. Its the Snakeman racing triple outboard 36, got any history on it? Its in great shape, i am painting it and doing some glass work for the new owner.
I have seen the wide washer type on some of the newer boats but noticed Peter still uses these and wondered if there was some reason.
I thought it was polycarbonate it was just easier to type lexan