It's hard to believe the maker of the adaptor didn't research the diameter of the 11/16-16 Flange nut to make sure they machined the hole to fit the nut...poor quality control on their part.
Mike B
Mike Boteler
1956 Chevy 3100 Resto Rod 1952 Willys M38 Army Jeep 1983 Jeep CJ7 Laredo 1984 Jeep CJ7 +++++ Silver Spring, MD