A threaded fastener equipped with a fluted tip that mimics a small drill bit. This design allows the screw to drill its own pilot hole, form mating threads, and fasten materials together in a single operation, eliminating the need for pre-drilling in metal or plastic.
Heard on the job
Run a self-drilling screw through that sheet metal ducting to lock the joint in place.
Insider tip
These are often generically called Tek screws on the jobsite, regardless of the actual brand.
Do not mix it up with
- Thread-forming screw: A thread-forming screw requires a pre-drilled hole, while a self-drilling screw creates its own.