The difference between self tapping, self drilling and CSK screws By: Charlenne Woodcock on 19th January 2024 × Carpentry Tek Screws A2 Walk through the basic facts and theory of what the difference between self-tap, self-dril and countersunk screws. Featured: Daniel Woodcock Head of Operations Related posts A short insight into what happened at the first Multifix Innovation Event this year - with more to come. Watch 's story