how do I locate a tapped hole in an assy from a block that mates with another block that has a clearance hole
Welcome to SW forums Ernest.
Check for hole series option in assembly or edit the part in which you need the hole and while placing/sketch positing, create a concentric or coincident relation.
If you can select the hole in the assembly it will highlight in your model tree.
Or in your model tree you can tree out the part and see each parts features.
Hope this helps.
Not knowing how much you know, let me give you one more clue to use in addition to the other answers here. Go to the Help and look up "top-down design" to learn about how to create in-context features.
Another method: Using hole wizard attach to the block with the clearance hole. For "postitions", drag the hole coincident with the tapped hole.
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