So I hit the local big box store and picked up some 3/4 x close pipe nipples, conduit nuts and a 1" hole saw. This seemed to be what everybody was using.
Is it normal for the nipples to get larger in the center? They thread in a little way and then stop dead because the hole isn't big enough. Same with the nuts, they start just fine and then they won't budge. Did I buy the wrong nipples?