Difference Self-Drilling Self-Tapping Screws

Self-Drilling vs. Self-Tapping Screws Self-Drilling vs. Self-Tapping Screws. Aren’t they the same screw?  So many different names for the same fastener exist that I wish I had a fastener thesaurus on my desk.  The other day a builder called looking for an expansion bolt. I knew it had another name, but I just couldn’t grasp […]