Hi Monsoon12
Both good answers to your question!!!
Question... when you state 8X8X3/8 for the dimensions of the SS square tubing? just out of curiosity, what is the length of this tube, and how precise must the location & size tolerance of these holes be with respect to their layout? are the holes to be located on more than one surface of the tube, drilled completely thru both walls or are they staggered in some sort of pattern on each of the tube's surfaces or all drilled thru one surface only? How many holes per unit? Finally, is there the potential of fabricating more than one of these tubes?
Why do I ask these questions? Simply put, to cover all the bases in order to respond with the best possible solution for your situation, and at the same time offering as much efficiency into the response to your query. Please let us know more so that we can add to the already excellent suggestions if necessary.
Respectfully,
Henry