What are the pre drill hole size
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Hello, The top hole to fix to the deck is 3/8" diameter, to fix the threads on you have 2 hole size : 5/16 to use with bolt all the way through or 5/32" ti be used with #8 x 1-½" screws from underneath. Reference : https://pylex.com/wp-content/uploads/13903DT-1.pdf Anything else, please let us know. Thanks
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